YES it does! I'm sitting here in the quiet English countryside, on a dark winter's night, looking high above me, into a black sky full of stars; many of which are now dead - but because of my unfathomably distant vantage point, are still up there shining, still ‘alive’. Could it then follow that an alien being sat on the other side of the galaxy, looking our way through some kind of ‘advanced super telescope’, could maybe - just maybe, see my late mum and dad, meeting for the very first time on that dizzy late summer's evening they used to tell me about? Believe it; somewhere, everyone and everything is still alive. ❤️
That alien would be seeing your parents exactly the way we see distant stars- something that happened a long time ago and of which we can only see an image. That is still “reality”, but it’s beyond us in a way; we cannot interact with it or influence it.
I’m watching this now, and it was made 2 years ago. But right now I’m watching this video so the past must always exist when it’s captured as a recording
@@Jeremy-Ai eh, no. That recording was made 2 years ago, and is still existing in the 'now' as you are now watching it, or at least 2 weeks ago so that now doesn't exist any more in the 'now' that I'm writing this comment. And soon that moment will also be gone to be replaced by whatever I'll be doing next today, but that recording will still be there if anyone wants to watch it in some future 'now' moment. Crazy, isn't it ?
This is the first video I see on this channel. This is very refreshing to have explanations without all the usual background music, hyperactive ton of speech, or lots of graphics moving around! The calm tone of the video is very good for learning!
I do love her channel's videos, and this is a big reason. However... the recent hydrogen power video would have greatly benefitted from 90% less "under pressure" gags. 🤷
This video made me realize how often we are watching the past. All TH-cam videos we watch in the present were made in some recent or distant past and can be played actively as if they are now in the present. All media and entertainment that’s recorded is that way. I think that’s why stories play such an important role in human development - story is time travel.
She is definitely on point about something. The nervous system functions just behind right now, because all electrical circuits more than less have resistance, ohms, and that ohm rating slows the processing capabilities of any connected processor. You will never in you're life experience right now
Interestingly, neuroscientists have shown that the human brain is constantly anticipating the future, making predictions based on past and present experiences. As an example, catching a ball requires us to anticipate where the ball will be and where we need to be in the near-future to catch it. Driving a car or any other physical task or experience is similar. In a way, we’re always operating in the future or at least with our prediction of the future in mind.
I do love the dry humor woven into the ‘story telling’ and then referred to again randomly…a stand up comic schtick that amazingly turns a physics lecture into a conversation between friends. Brilliant.
This starts to make sense when you think about how we percieve stars. If we observe one star that goes supernova 5 million light years away, and then another star that goes super nova 6 million light years away, each of those events happened a million years apart, and we just happen to be at the oberservable point to witness each at the same time.
This is the problem with knowledge and research. Some people are not naturally intelligent enough to comprehend it. Some ask “if a tree falls and nobody is there to hear it, does it make a sound” This stupid ‘but how do we know’ mentality reveals those who lack intuitive intelligence. It is a self-centric viewpoint. Light exists. Light travels at particular speed. It takes a relative (i’ll use the word) duration for light to travel a set distance at that speed. Yes those two events happened, at a duration we measured to be, a million years apart. These things are true. Focusing on the ‘meaning’ of this is self-centric. Those things happened and those were the factors. But that does not mean time exists or that the past still exists. The explosion that caused the light happened and then ceased, but the light created continues. I don’t know how or what exactly causes these phenomena or if existence is finite or not or even if there IS actually a creator, but it’s the ego that drives people’s theoretical wandering, beyond the realms that we are capable of. Time does not exist. It is merely a word we used to label a duration of moments. Time travel will never be possible in any way other than a technical way (ie. Australia are ‘technically’ in the future - but they are NOT in the future, they are in the same place, just at a different distance so are subject to different factors. Some people will get what i’m saying here, and some people aren’t capable, as they can only grasp things through technical language, limited to the definition of said language without the personal means to interpret the grey area. Objects exist before the labels we give them, and the objects are the inescapable truth, but the language can be inherently flawed
I hadn’t even watched the video when i wrote that. 5 minutes in: “how do you know your phone is there? You don’t” 🤦🏻♂️ ‘I think therefore i am’ - the ultimate self-centric expression of ego through philosophy
@@mexreax4493 it's true. Light has a defined and observable speed. We can only see things through light. So anything that happens a far enough distance is the after image we are observing. Take the sun for example. It takes light 8 minutes to travel to earth from the sun. That means that if something like a planet passed Infront of the sun. We would still see the planet Infront of the sun when in reality the planet at that specific time has already moved out of the way of the sun.
Thar "old" light doesn't exist. What we see isn't the old, it's the new part of the old. This argument is parallel to the river argument. In philosophy, the river argument states that if you step into a river, you aren't stepping into the same river twice since its constantly changing, but yet we call it the same river. The same can be applied to this. We can label the light old since it comes from the "old star". But the light has changed many times before it got to you. Therefor the light isn't really old, it's new.
I just have to say that her videos have the clearest, cleanest, crispest subtitles (cc) on YT. As an English teacher, I appreciate the attention to detail with the accuracy.
It's like a book or a movie on your computer. The beginning and the end is already there. But the people in it don't have a clue. Just like us. Since we're stuck in the 3rd dimension, we perceive things bound to time. To get out of it, we need a different form of body with a different set of new senses. Which we couldn't get until we die. So, "Does the past 'still' exists?" is like asking "Is Dumbledore 'still' alive?" On what page? Because he lives and he dies, everything all at once in the book.
Finale, not QUITE, if you were only living in 3 dimensions, there would be no change because there is no time... If you're only allowing three dimensions, the screen you're looking at right now is reality because you can see Sabine talking in 2 dimensions and she's MOVING... the only difference between either 5 seconds ago and now or now and 5 seconds from now in 4 DIMENSIONS is that the universe has gotten bigger,, matter and energy have gone on their dances together with the irreversible fusion of hydrogen and expanding through space-time,, meanwhile time and space seem to stand aloof since contemporary theories now speculate that the universe, or the substrate or whatever you want to call space, existed before the Big bang and the only thing we have to measure Time by is the expansion of matter, and the eventual decay of everything into first, the positronium sea in a universe beyond all comprehension of size,, with eventually at Year 10 to the 130th power AD ,, random photons neutrinos and maybe some electrons or other leptons that are so widely scattered that no interaction is possible, the universe is totally dark and chilled to absolute zero, and entropy peaks at 1... there, according to Prof Dave Darling, since there is nothing to measure past from present from future anymore, "time is - uncertain."
Fake news there is no outer space and 1/2/3 dimensions exist together but not 4/5/6etc until your there. It’s also an energetic spiritual thing. You believe the fake NASA mkultra programming bud.
Time is irrelevant what happened already happened, what will happen will happen, understanding this will free you from the clock. If time was relevant talking about this would be a waste of time.
Time is a fluid, like a stream flowing in one direction. Anything with mass creates drag, causing time to bend around it like a big rock in the stream. Only things without mass can move freely in the stream at the same speed as the stream itself, and thus it doesn't experience time at all.
@@bootre9148 It began to flow into our universe at the big bang singularity, it doesn't have an end, but can flow out of our universe through black hole singularities where time effectively comes to a complete halt as the superfluid leaves spacetime.
Or maybe it's all meaningless and isn't t special at all but useful to figure out. Maybe what really matters is that you are an observer and bring meaning to this vast messy whatchamacallit by simply living.
It's so clear when you explain it. I think I'll be coming back to this video often. The idea that (at least) the past always exists is the only way I've been able to cope with the loss of my loved ones.
If you can remember, they're not gone. That itself is proof enough. But the thing is, the past and future have never and will never exist, yet your loved ones have. They are not bound by space and time anymore, as we won't be when we pass. I recommend Rupert Spira or Bernardo Kastrup for further, more precise information. And I'm sorry for your loss. This won't fix the pain, but it might help you accept it.
@@SupportTheLittleGuy maybe we can! With drugs? Maybe one of this nerds can help us travel back in time, i could see my dead wife and have a good coffee with her... maybe the solution is just a shot to the head, but we have options at least
Immediately after watching this, I watched a documentary about Kurt Vonnegut, the author of "Slaughterhouse Five" and numerous other excellent novels. If for some reason you are unfamiliar with this book, it is about a man who becomes "unstuck in time". I read it many years ago. And it is the perfect literary accompaniment to Sabine's lecture.
Just discovered Sabine. I love her dead pan humor and style. Being a student of Non Duality (Advaita Vedanta) I find her examples so strikingly similar to the consciousness only model that it helped me understand the notion of consciousness contracting itself via the observer to experience 3rd dimensional reality and how all there is is now and our experience of this now. Thanks
"Now" is a mysterious phenomenon, it is an infinitesimal small point in the time. Most of the time we are constantly moving from the past into the future and "now" is a very small connection between these two. how big is the "now"? is it a second? or millisecond, or a nanosecond or a .............? no end to it. the passed femtosecond at this moment has also become the part of "past" but our consciousness still perceives it as present. the "NOW" perceived by us is an illusion created by our limited perception, our conscious mind throws itself to a time span which includes the past and future, and perceives it as "now". it depends upon the limited speed of our neurons in the portion of our brain which senses the time as "NOW" and when a person can be in that moment of "Now" and flowing together with it, i think that is called as "Meditation".
@@dharmendrasharma6070 there is no past and future. No one has ever experienced the past so it must be as illusion of sorts. The now is beyond space time and not a piece of it as you’ve stated
If there's no past how can we take a video or snapshot of it and keep it forever? If there's no future how do we progress with how we grow? How flowers grow/die? This is ridiculous to think these things don't exist
@@vhawk1951kl There needs to be a comma between pointlessly and uselessly. Plus a capital letter at the start of your sentence and a full stop to close your sentence.
I agree. Time isn’t a factor of state change. It’s just a term that people use to try and comprehend the movement of matter. To do “time travel” you have to assemble matter into a state that you believe represents how it once was. The implication being that if you can do that, why not use the energy on something more valuable than regressing.
Time isn't illusion. Time is motion, motion is time. To move from one state to another, which is existence, requires the motion of time. Without it there's nothing, which is timelessness. The perception of time is subjective, and it's this perception which is illusory.
But if you merely assembled matter into what it once was that wouldn't change the present because that would be a separate action altogether but your statement is very well thought out
i witnessed, in my own livingroom in march of 2021' at 5 a.m., an event(i would call it). i had already had plenty of sleep so i was laying in bed reading things on the laptop. there was an orange light reflection off of my opened bedroom door which is across from our livingroom window. at first i ignored it because i thought it was my daughters tail light reflection from her car, thinking she mustve gotten up extra early for work. a few moments past and the light was still reflecting and as i studied it, i noticed that it resembled how fire flows. of course its just light reflecting only because the window itself has a cheap plastic blind over it which we hardly ever open. next i realized i need to pee and i best not keep trying to hold it. so, i slowly sat up, reached over for my cane, slowly rose to my feet as not to get our 3 dogs awakened, and hobbled only 6' feet to my door and i first noticed the entire livingroom was dimly lit due to that orange light. then movement caught my eyes just to the right of that window and i witnessed a 4' foot long sparkling-like upside down cone shaped image that was in the middle of dissipating upwards into the ceiling. well, im no dummy! it looked exactly like the star trek old series where people get beamed up. i stood there in my doorway, frozen. i instinctively knew that if i got caught up in transference that i may get sucked in. as soon as it finished, our dogs instantly woke. i stepped into the room and hobbled to the next room to the window with the shade usually up but the orange light was gone. and it was totally dark outside. i couldnt stop there long because i had to pee badly. in the bathroom i heard my daughter in her own bathroom. back to my room i called her on my cellphone to be careful outside because i seen something and there was something in our driveway. the point is: travelers in time are helping themselves to peoples homes anytime they choose and thats not right! i always imagined there was a natural protection against that stuff, like GODS LAW. i was concerned about my granddaughter who sleeps in the room beside mine. so there are travelers
How i understand the "now" is with this example: 1. Person A goes on a spaceship and travels through space-time 2x the speed of person B 2. Person B has agreed to press a button 5 years after Person A has left. But because they know about time dilation Person A knows to press the button 2.5 Years into his travels. 3. When both press the button they are pressing it at the same "time" / in the "now". And therefore they are both existing in the same "now" even though they arrived there at different "speeds" ergo "now" is experienced differently, but is still the same moment. 4. If both persons had agreed to press after 5 years, Person B would press the button, but would have to wait another 5 years to see Person A pressing said button. (assuming that visual contact is instant). 5. The original button press with 5 and 2.5 years, both people would see each other pressing the button at the same "time" or in the "now". I might be super wrong, but thats the way my head has understood time LOL. Please correct me if its wrong.
Fellow dum dum but this makes sense to me. It doesn't compute in my head the other way that they are experiencing different "nows" even accounting for time moving at different speeds.
Also notice that our memories can have differences in this manner. My memories of 50 years ago ( I am 80 ) are in a distant past...but the things I did, that I wish I hadn't, such as being rude as a teenager to someone, and we never forget, is as if it was yesterday.
@richclarke1523 Hi Rich, it was so good to read your comment! I hope you can at least find some comfort in the fact you remember your rude teenage years with regret. It means you've gained the empathy that you lacked in the past. You should feel good about that, since so many people still have not evolved from their bad behaviour. And even worse they have no self awareness, and they have no clue of how others perceive them.
That has nothing to do with physics or time as a physical constraint. Also shouldn’t that answer the question of the video? If you remember something as if it happened yesterday, then why would you doubt that the past exists?
I was with you all the way until 0:22…..I can now tell the future thanks to you though, because I am going to the pub in 15 minutes to drink heavily to try to make sense of all this.
So happy this came up in my feed. I have always been interested in math, physics, and engineering, but am nowhere near smart enough to have had any success studying it. So happy there are smart people who are able and willing to explain it to dummies like me!
I was always too scared to pursue science for higher studies tbh. Most people are. None of us are dumb, since we're all humans lol. You just have low self esteem, you're not dumb ♡
If you know any, ask a grownup to explain to you why nothing can be " *very* or nearly(as is occasionionally heard) unique" - see also *very* pregnant or *very* dead. I am a little puzzled that you appear unable to understand that, but seemingly you have no idea what unique means.
@@MrZorx Ask a grownup that speaks English to help you; pregnant and unique are absolute terms like on or off and dead -thus very unique and very pregnant are no more possible than very, on very off or very dead. Whoever says to you than an object is very or nearly unique is either an imbecile or an American, but then most Americans are imbeciles and I have never met one that can speak English similiter very or nearly or quite pregnant, and anyone that tells you otherwise simply cannot speak English and is a halfwit. You will occasionally hear 'very' pregnant when used to describe a woman that is obviously pregnant, but it is simply bad English. Unique means that there is *only* one which it either is or is not which is absolute, but you will hear the lower classes and those that are simply witless say nearly unique and that *because*they are witless members of the lower classes and do not understand what unique means, nor understand anything about absolute and relative terms.
The fact that time exists, no matter where you go in the cosmos, you can't outrun time. You can't not exist without it, or you won't exist to know that? Its all important, and may be the actual being, we call GOD. It witnesses everything at once. Isn't that God? Its every where at once.
@0:06 While I will avoid the debate of time existing or not. If we simply focus on the title of the video, well, does the past exist? Yes. Yes it does. Proof: If I look into the night sky at Sag A, well, I am not seeing Sag A tonight, I am seeing Sag A as it existed 25000 years ago. If I am looking at Betelgeuse which rests 643 light years from earth, well I am not seeing Betelgeuse today, as I am seeing Betelgeuse as it existed on 11/22/1380. Now, if there was a planet around said star with life on it, and my telescope powerful enough to see said life form I would be seeing said life form as it existed in the 14th Century, and vice verse.
Such a cool coincidence that I found this video today! Just yesterday I was thinking to myself that the past is no more real than fantasy. Specifically I was thinking about my city, the version of it that existed 20 years ago, and how that place may exist in my mind and the minds of others, but so do Oz and Wonderland, and none of these is a place one can go. I’m glad to be challenged and informed on this at the same time!
I can understand how you would proceed if the past is fantasy but you can't take it too far because there's one key difference. That difference is things that happened in the past actually did happen and they have an influence on the present and since things that were done or bills or said in the past can still be a witness today that that means the past is never truly gone.
The only caution I would add is...the past does, in fact, exist now for some place/time, but this is not necessarily compatible with saying that it exists in our minds. Our minds do not contain the past. They contain perceptions or conclusions only. They are mere interpretations and can be and likely are ALWAYS "wrong." Example: Newton was wrong when he came up with his equations and laws. He thought he was right. Many thought he was right. He was, indeed, possibly partially right, but he definitely was not correct. Nor is ANY perception that we have actually the "real" correct perception. It is both incomplete AND wrong, due to our lack of knowledge and our incorrect assumptions that some things are one way, when they aren't.
I think you should look for a refund on the book . Anybody that would use that Albert Einstein as some kind of example in a physics sense of the word is more than CLUELESS . Einstein was. created by the J's in the same way Pop -acts are created today. !
Its 3.00am and I couldn't sleep. Just watched this video and at long last I understand Einsteins Relativity theory. It's like a mist had cleared. After decades of uncertainty over it you have now explained it! Thank you so much!!!
It's exactly 3:38 for me, theoretically, me and you have experienced something in our lives that contributed to the experience just a few minutes a part we just went through, how interesting
Dear Mrs. Hossenfelder, Thank you for your work and efforts in the service of educating the public while making the concepts accessible to a large audience.
I have watched many videos about physics trying to understand all this. Without doubt, this one is the best explanation in simple terms that I have come across
The past is impacting me as much today as it did the moment it first happened. When people say that someone should forget the past, they are not aware of the impact the past has had on the individual in question. We should have individual sovereignty because we are each, in and of ourselves, an individual cosmos that is still learning about how to take responsibility for the planet and its inhabitants.
It is true. Simply redraw the conception of your individuality with some interesting axes, and voila! Oh and also be born into a certain tribe who controls publication lol
I like the down to earth explanations. The greatest indicator of intelligence is shown by someone who can explain advanced ideas in such a way that anyone else can understand. Superb!
The fact that time exists, no matter where you go in the cosmos, you can't outrun time. You can't not exist without it, or you won't exist to know that? Its all important, and may be the actual being, we call GOD. It witnesses everything at once. Isn't that God? Its every where at once.
@@Rockhoundingcolorado Maybe there is no GOD. we would found life outside our solar system soon. you cant prove GOD exist , but you can prove science exist.
@@pttimothys life is a virus, and life evolves. Just like a virus. So where it exists, there is no stopping it. That could be why we are at the outer edge of the cosmos, instead of at its heart?
@@pttimothys Well by god, I mean creator. I don't think it has any power beyond our own. Thats why it can't enter act directly with its creation, and we, if its true that we are a creation. Then the same elements that we are subject to. So it would be like gravity, heat ,cold, If time is this all seeing all being. Then it is constrained by the same elements we are. Except time, which it can access like a computer. It may even relive the events in its minds eye at will.
@@pttimothys What WEBB is telling us, and showing us. Looks like a giant neural network. Perhaps it is? If something would have created life, they would have hacked that to do it.
The past existed once as now...This topic is too mind bending, and perplexing for someone like myself to comprehend. Great video 👏 You are a brilliant woman 🙏
It's similar to calculus where you integrate each slice of a graph. With time each slice is a moment. When you 'integrate' them all together you get regular time.
Aside from the similarity between the breakfast I was eating as I watched this and what my brain felt like at the end of it (scrambled eggs), I was truly enlightened, as always, and thankful that Sabine has created this YT channel.
My chemistry professor called theoretical physicists "those theologists in the other building". I totally agree. Science begins and ends with observation, not with theory.
Not now that the internet and digital world exist it changes everything. We can go back and interact with something we did yesterday , alter it , continue or discontinue a conversation , interact. W it differently to determine our future. For instance if I leave This comment and never come back to it my relationship in this timeline of events it’s over ….but if I ask this nerdy strange lady out on a date and she dms me yes , then I enter a new timeline that didn’t exist until she DM’d me . Hopefully she won’t break my heart or I’ll be stealing her Time Machine
Is kind of humbling that things like time or gravity we are only begining to undestand how those concepts work but have absolutely no idea about why work and what creates it.
to 114: all it means is that when something happens (the "now"), it takes time before you see it. Because it depends on the light reaching your eyes, which takes time. So, you are late seeing it. Therefore, when you do finally see it, the event or some thing may not even be there any longer. Or it's in the next "now" that you don't yet see. So we are always already in the past. This is more obvious at long distances. For beings living on a planet a biilion light years away from us, Brahms 1st Symphony has not yet been composed or heard. It's still in their future! They will hear it in some millions of years. They will observe it then. If they're as smart as Sabine, they will know that Brahms' 1st was written long ago, by those called "humans". But it's not true in this sense: they may well see my grand- parents in some millions of years but my grand- parents are no longer living their organic life, and not being conscious. The distant inhabitants will not be able to insert themselves into their lives.
@@nicolasdelaforge7420 This is not correct. The observational delay you are focusing on - due to the fact it takes time for light to travel some distance - can be realized while still falsely thinking time is absolute. It is essentially no different than the fact in everyday Newtonian physics that it takes any object moving at any finite velocity some finite time to move a finite distance. Special relativity says more - that time itself is a frame-dependent coordinate. Time is not absolute. Two observers in relative motion may agree that a photon from a distant star must have actually been emitted sometime in the past, but they will not agree on *how long ago* in the past it happened. In fact, the first observer will not agree with the second observer even on what the spatial distance is between the star and the first observer - spatial lengths are also different in relatively moving frames. (You might have heard of this referred to elsewhere as "length contraction".) This allows for a new notion of "distance in spacetime", usually called the spacetime interval, to exist when all four coordinates are combined in a special way. This the two observers *do* agree on, though they disagree on times and spatial-only lengths considered separately. Though Sabine didn't have time for that in this video, it comes out of the same mathematics that forces time to be frame-dependent.
I love Alice!! That was a great example of why I love Prof Hossenfelder's videos. Not pure technical talk. A touch of humor as well. Well done and thank you!
Everything is seen in past tense. Light travel time plus our nerve response time to compute in light data coming in which then goes chemical response, nerve electric response then chemical then electrical then response recognition signal. This does not happen quicker than speed of light. So all we see is delayed and past time.
@@Smokin4CHRIST She addresses that in the video. The point I take away is that since there is an observation frame from which things that happen "now" for us either have not happened yet, or already happened, there can be no definitive determination of "the past." We can only talk about it in terms of our framework. But if I REALLY understood this stuff, I would be a professor too LOL LOL
Outstanding video, brava! Yours is a fabulous production that addresses a rather complex subject in a fairly easy-to-comprehend fashion (along with a pinch of humor that renders the discussion delightful). Thank you so much for the upload. P.S.1- I adore Frankfurt, where I resided for about four great months, millennia ago (1994). P.S.2 - Will your publication be available as an audiobook? Cheers! ////////////////////////// Hervorragendes Video, Brava! Ihre Produktion ist großartig und behandelt ein ziemlich komplexes Thema auf relativ leicht verständliche Weise (zusammen mit einer Prise Humor, der die Diskussion unterhaltsam macht). Vielen Dank für den Upload. P.S.1: Ich liebe Frankfurt, wo ich vor Jahrtausenden etwa vier großartige Monate lang gelebt habe (1994). P.S.2 - Wird Ihre Publikation als Hörbuch erhältlich sein? Prost! ///////////////////////// Excelente vídeo, Brava! Sua produção é ótima e abrange um tema bastante complexo de uma forma relativamente fácil de entender (além de um toque de humor que torna a discussão divertida). Obrigado pelo upload. P.S.1: Adoro Frankfurt, onde morei durante cerca de quatro ótimos meses, há milhares de anos atrás (1994). P.S.2 - Sua publicação estará disponível como audiolivro? Saudações! Subscribed!
Time and space has always fascinated me. I remember in college being told that the light from the stars we see now left thousands of years ago .so I thought, well, suppose the world ended at the furthest edge of the universe. we wouldn't know that for millions of years, so maybe the world has already ended, but we don't know about it because that time and space haven't reached us yet. Any thoughts on this?
That's exactly what it means. Search for videos about the "vacuum decay". It is possible that the universe is only in a semistable state. If it is true, at any moment at any place it may switch to the true stable state. However, that would mean all matter is destroyed, because some basic properties of physics would change. And this effect would propagate itself through space like falling domino blocks at the speed of light. So, it is possible that it already happened somewhere. And this "wave" of termination races towards us at the speed of light. And there is no way to detect it, before it arrives and everything (in our fragment of spacetime) ceases to exist.
The time ( past ) is stored in the light . but we will never be able to see the past only aliens who are far away from us can see our past , but they will never be able to see our presence .
Man findet heutzutage absolut selten Leute und Videos wirklich wert anzusehen. Dieses Video ist eine solche Ausnahme. Das Thema, die Präsentation, die Erklärung, die Recherche - absolut top! Schade nur, dass man nicht persönlich eine Debatte entfachen kann - die wäre durchaus sehr produktiv. Alles in Allem - sehr empfehlenswert!
Sabine, viewing from Perth, Western Australia. Many thanks for your excellent video.I look forward to reading your book in the near future. King regards, Noel
Richard Rohr says that if things we derive in systematic theology are true, then we should be seeing them in science too. I've watched this marvellous video several times, and I can think of about five. Excellent!
The problem with systematic theology is that, no matter how 'systematic' you get with it (and how many Latin or ancient Greek based scientific-sounding terms you create within it), it is still ultimately based on source material of dubious origin or reliability. It is exactly the same as a 'systematic' approach to studying Moby Dick or Harry Potter. For example, in systematic theology there is a category called "Pneumatology" which is the study of the Holy Spirit. I could make up a fancy word for 'the study of the ghost of Christmas past' and use Dickens' "A Christmas Carol" as my authoritative source. None of it would have any obligation to align with reality in any way, though I could make it, with enough imagination.
@@Daniel-Strain Exactly, in other words, if you can convolute a subject, any subject, enough to where 98% of the general population feel it's beyond their capabilities to understand, you can't get away with anything. I can deal with Moby Dick, mainly because it has the word 'Dick' in the title, and I know for sure it's pure fiction, but try to explain to people that theology is a bit of fiction as well, good luck with that...🥴🤣
Sabine, you are one of my intellectual heros. What we consider the present is perceived recent past. This is why is is so difficult to truly be in the moment. Our brains are always in catch-up mode.
I know this might get glossed over, but I think it is interesting to think about what constitutes an observer. I think biological observers are scaled up, and the potential for an observer can be found as far below as a subparticle. For something to interact with universe (collision or force) besides the mass that would allow it to do so, the position it holds also counts. Having each particle observe allows each particle to interact whether it contains mass/force or not. Observing a particle would collapse its wave function, however a particle does not need to observe itself unless it was observing something relative to it like hearing involves not just the position of the sound but also the observer. It seems weird to imagine a particle could "hear", however it would explain hearing itself if we were able to scale down a system to the size of a particle. In other words, nanosensors right? I feel like it has already been done, and I am just dense.
When I think about the past. Technically the speed of a human thought is roughly as fast as the speed of light. (Neurons firing sparking a chemical reaction producing the thought) Therefore it is possible to subconsciously travel back In time because the speed of your thought got to the past, in “no time”
here is an exercise i created for my students back in the seventies on the validity or non validity of past and future. Think of something you did yesterday . Now ask yourself -" when am i remembering this past event ?" Now do the same for a future event , say dinner with a friend next week . ask yourself again ," when ami i thinking about this future event ". the answer is always NOW . repeat in five minutes or five years , the answer will always be NOW. this of course doesn't prove that there is only now , but it certainly might makes us question the validity of past and future .
This is likely the best TH-cam video I've ever seen on Einstein's 'Theory of Relativity'. Sabine's lecture simultaneously linked with graphics has made it so much easier to understand.
OMG this is a truly incredible video, best one I have seen on the subject. This really is an incredibly good lecture. I have been studying this subject for many years, back then most of what I worked with was in Physical Review D and books. Some great books out there got me interested in physics and math, but I am very impressed by this video and the deep subjects you talk about. I was a math physics major, though the truth is that most of these fascinating concepts can be understood through thought alone. The math is certainly interesting. I had to see how it worked. The Tipler cylinder was my first interest, in the math model it is infinite in length so it does not collapse into a black hole. Anyway we know that time like coordinate becomes spacelike and spacelike becomes timelike, but I had to see the math. I used to talk to Tipler, and Gott on the phone way back, then later I got into Caltech though I did not go. In any case I study this stuff for fun, and this video is magnificent. BRAVO.
In a way the past does exist and we can re-live them in our memories whether they are good or band moments. The past may not exist physically but it does mentally.
Sort of like turning an egg into an omelette the complete egg doesn't physically exist anymore as it became an omelette but we can remember it as a complete egg.
The fact that time exists, no matter where you go in the cosmos, you can't outrun time. You can't not exist without it, or you won't exist to know that? Its all important, and may be the actual being, we call GOD. It witnesses everything at once. Isn't that God? Its every where at once.
Thank you, Sabine. I am even more taken back by this place we find ourselves in. The beauty and mystery always seem to deepen. Answers seem to always create new questions.
@@LuckyFlesh - I agree with you, Lucky. Some people seem not to be able to evaluate, appreciate, reciprocate fruitfully. They seem to lack imagination and seem to be stuck in a (social, theoretical, ideological) box and if the course of events doesn't match the expectations generated by their mental model, they are frustrated and unhappy (and sometimes vengeful) instead of enjoying the sublime awe and wonder of the flow of everlasting TAO, LOGOS, RTA, etc. that produced them and their capacity to model and everything in the first place. By their fruits, ye shall know them. Cheers!
I once heard the block universe described as the "view from nowhen" and I still think that's once of coolest phrases. The graphics in this video did a great job of showing it along with the concept of time sliced at different angles
block universe makes sense just from observation. we see time and space are one, thus the further we go away is just going to the past. thus far away “past” is now there. thus they both exist at the same time -> it’s not actually the past! it’s the present. just a different location. the edge of the universe is the big bang.
I've been metal detecting for 35 years. Each time I find a roman coin or medieval buckle I'm always aware I'm the first to see this light since it was lost. A direct link between Two periods of time.
Time is⁸ nothing but a measurement, Ubuntu it has no matter, atoms, volume, mass. 6TH GRAVITY can slow down clock's or other mechanisms that measure time but it can not have a effect on time.
@@larrywright1589 'time is a measurement' and 'gravity slows down what the measuring devices measure' don't go well with 'gravity has no effect on time'
When coin was laying underground , time was frozen. But when you find it, time for coin began go fastest, coin began moving. Conclusion: time is energy. i've been writing program's also for 35 year's. Each time i write line " if i found coin then BEGIN ... END" i know that time for part between BEGIN .. END is frozen but not between if and BEGIN. And when found, then energy of processor touch BEGIN and time go fast between BEGIN .. END. Surely in computer time is energy of processor.
@@larrywright1589 time was frozen, therefore have not longitude . It's link between Two periods. Answer: 0s for coin. But for other's i don't know. Time is abstract meaning of energy. Time is called always time, but energy is usually called differently for different kinds of energy.
Bravo! I have never heard such a good explanation of the Block Universe! Now this saying makes perfect sense: Time is a thin line of perception through an infinite universe of happenings.
The fact that time exists, no matter where you go in the cosmos, you can't outrun time. You can't not exist without it, or you won't exist to know that? Its all important, and may be the actual being, we call GOD. It witnesses everything at once. Isn't that God? Its every where at once.
@@larryoxentine8310 How do we know its not. Its not only self aware. Its aware of everything thats ever been done. By anything. A voyeur of everything..
yes, agreed - to me the most obvious factors here are - the earth's, sun, moon, stars movements, bringing light & dark & the seasons plus our own self-reflection, awareness & language, giving us the realisation that we are mortal & so time as a construct is essential for us to do things meaningfully, to plan ahead & remember the past within a "time-frame" - - but all of that IMHO does not make time any more real than any other human constructs or perceptions
Interesting. I don’t have the mathematical/physics knowledge that you do, Sabine, but I understand the gist of what you’re saying: Essentially that what we perceive as “now” is actually delayed by some tiny micro-fraction of a second from the moment that it actually occurred. That makes perfect sense to me. What I actually thought you were going to discuss (or you did, and I didn’t get it, LOL!) was whether or not what happened in the past still exists in the past: in other words, could one travel back to the past and witness what happened, watching it, even physically touching it in real time? We can already watch it to a degree: Photographs exist. Film and video exist. That’s almost like a form of time travel in that it captures a moment in time that we can perceive with our passive senses (sight, sound). But could we go back and touch it, interact with it? Does it still exist on some dimensional plane that is tangible? Is someone who passed away years ago still alive in the past? Could a time traveler speak with him and be understood by him?
I wanted to know does the past, present and future operate simultaneously with each other and are they all equally valid - or have we only the present? If the past exists, then are we always going to be alive somewhere?
Something like this: Time might be somewhat though not exactly reversable within small isolated systems and ~great effort~, which we may be able to externally observe. In replaying that timeline we could plant a clue in the form of another isolated sub-system which they could read and then alter their behavior. They could communicate back only by dissipating energy out of their system into ours, which we would have to replenish and then some to keep their timeline growing. I suspect it quickly devolves into any number of clues and timelines where whatever you were looking for ceases to have much meaning. And when you start seeing all the clues before you even start the experiment it becomes rather ghoulish.
So, same principle could apply to sound. Someone firing a gun would hear it the moment they pulled the trigger (that observer's "now"). Another person several miles away would hear the same gunshot a few seconds later. The gunshot is in the past, but actually, that event only exists then for that observer.
Yes and exactly the same is true for light. But, contrary to Sabine’s theory, I can’t see how that would mean that a past event still exists, rather, I think that the emitted sound, light, radio waves travel through space eternally and can be observed by whoever is at the right place at the right time. So I don’t think we can travel time, but we could possibly fly away from earth at the speed of light and then receive the world’s TV and radio program from the 70ies.
Yes, but how about if the sound is blocked somewhere between the source and the person who could hear it? For that person, there was no gun firing. Same if the the light of a star somehow can’t reach us because it’s being blocked. For us, that star simply doesn’t exist. So the whole thing about time is the light that travels from the source to you, but if there is no light to see, then you can’t see the past and it just don’t exist anymore.
@@maxsteinhausen2197 - How can you travel at the speed of light in order to catch up with TV and radio signals traveling at the same speed of light? You would never catch those signals. So, you would have to settle on sitting in one place and waiting for broadcasts of reruns to reach you.
Something I've pondered for a long time is how events in the past essentially cease to exist as we know it. I have lost people and pets in my life and cant help but wonder is that it? All the memories I have attained is what's left and nothing more? The individual moments have just fluttered away? The more I think about it the more odd it seems.
Energy is never destroyed, energy is information. Thus, information is never destroyed. It's all eventually encoded on the event horizon of a black hole, of which there are an infinite number, most of which are no bigger than a plank length, and encoding one bit of information.
The answers are written in the Bible. I know most of you think science has all the answers. Just think about it. No big bangs have ever recreated anything other than destruction. The grand architect the almighty created this all. The ultimate proof I can explain. It takes a male and female to make a human. But how did the first man and woman arrive? Better yet the first male and female did they start out as babies? We know that a baby cannot feed itself or care for itself for the first several years of its life. So how did the first humans come to be? It's written in the Bible God the creator made Adam and Eve.
With this question, I think many would think of 'present' in terms of the conscious experience of 'now' rather than in terms of where physical stuff might be.
I think it's both. It's also what state we and the rest of stuff are in, after events of the past have occurred. In the future what's happening now will leave its mark too.
i dont see what that changes really. Wether you pick the “now” where you’re thinking a certain thought or experiencing a certain sensation OR you pick the “now” where some things happen to be in a certain place, all the rules are still the same. It’s still possible that some observer in the universe can observe you thinking about my comment and see it as happening at the exact same time as a supernova that happened millions of years in the “past” from your point of view.
Nobody believes the light we see from distant supernova explosions came from an explosion now. We all intuitively use "now" to refer to the local time of the event occurring. We see it now, it happened years before. The fact that we can't definitively know now, because everything happens outside the now of our delayed brain's local time, while as uncomfortable as any other conclusion of skepticism, is not a rational reason to believe other counterfactual theories that would allow us to believe we have real knowledge.
Time is experienced two ways: Chronologically or simultaneously. If you wish you can look at a clock and not think about anything but the seconds that pass in order, or you can think of a number of things at the same time. To say that the past exists is to say that it exists perfectly, ready to be experienced and/or observed perfectly with nothing missing at all; if even the smallest thing is missing or altered, it's not the past- it's something else. If the past still exists, it would be nice to know how to access it just for entertainment and reflection if nothing else. Great topic!
@angelita1895 Right!! Maybe versions of the past exist?? Then it would have to be acknowledged as something else- not the actual past!! Thank you again- you made my day!
I remember taking pictures of my grandmother one Thanksgiving in 2017 and with the family something felt special at that moment it was beautiful. The following year 2018 in September she passed away. I look at those pictures today of that special time and still feel like I'm in that moment!!! My mother passed away a month and a half later and I can still feel like I'm holding her hand on her last days, I feel it like it was yesterday!!!
@@edbaiza7757 That's so beautiful and very powerful in many ways- my condolences on your loss and I'm so grateful for that wonderful memory captured in time; may it last forever in your heart and mind!
Long ago a thought occurred to me about those films my teacher showed our class in grade school that being that the roll of film was all of time past and if you could pick a point or place along that roll is being a point in the past which you could hypothetically look at or even experience. Now it's interesting to see a smart person talking something in those same terms or similar thought exercise. Thank you for your 'films'.
Yes as Energy or the Negative charged electrons but our human life span isn't a Mini Micro Blip coppered to all of all Existence. So it still nothing. Like the amount of Electromagnetive waves that Negitive Charge releases and we only see the visible light spark. it's absolutely Nothing to the whole
Now is just a Micro Nano Second moment moving through Space/time. it's gone before you can count it because Negative Energy is always moving towards the Positive.@@Flylikea
The differences in the now and all nows existing at the same time for some observers feels mindbending, but is not really as amazing as it sounds. Space itself should be the great equalizer here. If for example our earth 1000 yrs ago is the now for something somewhere in space, it should still take a 1000yrs to bring these two together.
Best comment here! So there is no advantage to live in the same "now" (1000 years ago) far away, if you can't reach the place "now" an so you can't have the experience of the same "now" which is 1000 years away from you.
@@magichands135 And it is precisely this fact that reassures me. Remains only the mathematical possibility of wormholes. That could trick the space... 😱
If Sabine's the CAKE & consider me, a frosting on top of it. Sabine do you love this experiment in LAB or somewhere like, you choose the place for this experimentation & let me know.
So why does Einstein arbitrarily call "now" the moment at which light hits the mirror? Isn't actually the instant the light emanates from the observer?
If I understand this correctly, when I observe of an object at a distance from my "now", I really am viewing the object's "past" due to the light having to travel. Also I have just pre-ordered your new book and look forward to reading it. Thanks, Sabine.
The big bang is a Janus hole/point -- Julian Barbour, physicist. White holes are dual to black holes. Janus points = Janus holes. Points are dual to lines -- the principle of duality in geometry. Janus or two faces = duality. Topological holes cannot be shrunk down to zero -- non null homotopic. Gaussian negative curvature is defined by two dual points -- non null homotopic. Positive curvature is dual to negative curvature -- Gauss, Riemann geometry. Curvature or gravitation is dual, gravitational energy is dual. Potential energy is dual to kinetic energy. Apples fall to the ground because they are conserving duality. Gravitation is equivalent or dual (isomorphic) to acceleration -- Einstein's happiest thought, the principle of equivalence (duality). Antinomy (duality) is two truths that contradict each other -- Immanuel Kant. Space is dual to time -- Einstein. The future is dual to the past -- time duality. We predict (syntropy) the future and remember the past. Time dilation is dual to length contraction -- Einstein, special relativity. Energy is dual to mass -- Einstein. Dark energy is dual to dark matter. From a converging, convex or syntropic perspective everything looks divergent, concave or entropic -- the 2nd law of thermodynamics. All observers have a syntropic perspective according to the 2nd law of thermodynamics! My syntropy is your entropy and your syntropy is my entropy -- duality. Syntropy (prediction) is dual to increasing entropy -- the 4th law of thermodynamics. Teleological physics (syntropy) is dual to non-teleological physics (entropy). Homology is dual to co-homology -- topology. Decreasing the number of dimensions or states is a syntropic process -- homology. Increasing the number of dimensions or states is an entropic process -- co-homology. The 4th law of thermodynamics is hardwired into mathematics. Convergence (homology, syntropy) is dual to divergence (co-homology, entropy). "Always two there are" -- Yoda. Duality creates reality.
That is correct. This was covered in more depth by the much older documentary series "The Real Thing" by James Burke, which dedicated an entire episode to the problem of light taking time.
Take a picture, lets go with a 35mm camera with a horizontal shutter. The image on the one side of the picture is slightly different than the other side. Depending on the speed the shutter moves, it could be 1/200th of a second different. Anyway, I'm not going to rattle my brain over time. It exists so matter can move.
I think of this alot, sometimes I think of my past experiences and whether they actually happened or not. Sometimes I feel like time is like a line, we can see the point in the line we were at, but we're at a point in the line where we've past it. Almost like a space, I cant explain it, but it causes me to wander off in my thoughts.
I've been patiently waiting for Sabine to make a video on this topic. It's about time.
It had to happen.
it's all in the past now
This video had always existed, you just needed to wait for it
I see what you did now.
Dad?
YES it does! I'm sitting here in the quiet English countryside, on a dark winter's night, looking high above me, into a black sky full of stars; many of which are now dead - but because of my unfathomably distant vantage point, are still up there shining, still ‘alive’. Could it then follow that an alien being sat on the other side of the galaxy, looking our way through some kind of ‘advanced super telescope’, could maybe - just maybe, see my late mum and dad, meeting for the very first time on that dizzy late summer's evening they used to tell me about?
Believe it; somewhere, everyone and everything is still alive. ❤️
Thank you for writing your message, I took more from your comment than the video. Very nice and comforting.
@@nautilus1872 Thank you.
I got a lot from your comment aswell, thank you
Very thought provoking and a lovely comment.....good luck to you.
That alien would be seeing your parents exactly the way we see distant stars- something that happened a long time ago and of which we can only see an image. That is still “reality”, but it’s beyond us in a way; we cannot interact with it or influence it.
The past haunts me every day, whether it still exists or not.
it is ALWAYS THERE
It's not the past doesn't haunt us, it is us who haunts the past.@@stephenpalmer-zh9dq
Your thoughts are not you
Felt
If you start exercising everyday the bad thoughts will stop but you have to everyday, its a way of telling your mind what its going to do
I’m watching this now, and it was made 2 years ago. But right now I’m watching this video so the past must always exist when it’s captured as a recording
It exists, there is something irreplaceable and irrelevant to it,
perspective and effort to responsibility have something to do with all
@@Jeremy-Ai eh, no. That recording was made 2 years ago, and is still existing in the 'now' as you are now watching it, or at least 2 weeks ago so that now doesn't exist any more in the 'now' that I'm writing this comment. And soon that moment will also be gone to be replaced by whatever I'll be doing next today, but that recording will still be there if anyone wants to watch it in some future 'now' moment. Crazy, isn't it ?
Relative to me, you wrote your comment in the past.
This is the first video I see on this channel. This is very refreshing to have explanations without all the usual background music, hyperactive ton of speech, or lots of graphics moving around!
The calm tone of the video is very good for learning!
Same here. perfect for learning
Absolutely love videos without background music.
I agree, ton of video looking for watch time and less explanation.
Because she's not American. I'm glad there's someone else who hates the "hyperactive tone of speech" 👏
I do love her channel's videos, and this is a big reason.
However... the recent hydrogen power video would have greatly benefitted from 90% less "under pressure" gags. 🤷
This video made me realize how often we are watching the past. All TH-cam videos we watch in the present were made in some recent or distant past and can be played actively as if they are now in the present. All media and entertainment that’s recorded is that way. I think that’s why stories play such an important role in human development - story is time travel.
Thanks Capt Obvious
Only if its honest
@@darith770poor trolly mad in the comments
History books can take me back
Memories too.
My teenage son passed away from an AVM stroke recently and I'd like to believe that part of him still exists out there in space-time.
Sorry for your loss.
Sending love and light ✨✨✨
Without a doubt, your son is so much alive in Heaven! ✝✝🙏🏻🙏🏻
Sorry for your loss, I believe that, that is a thing. I always have.
Energy never seizes to exist, it transforms.
- Einstein
She is definitely on point about something. The nervous system functions just behind right now, because all electrical circuits more than less have resistance, ohms, and that ohm rating slows the processing capabilities of any connected processor. You will never in you're life experience right now
Interestingly, neuroscientists have shown that the human brain is constantly anticipating the future, making predictions based on past and present experiences. As an example, catching a ball requires us to anticipate where the ball will be and where we need to be in the near-future to catch it. Driving a car or any other physical task or experience is similar. In a way, we’re always operating in the future or at least with our prediction of the future in mind.
Not exactly sure about what you said but i did enjoy the way you said it.
she lost me at the intro when i didn't have enough time to read where the little hand and the big hand were pointing to.
You have to be a Godless moron to think anything she said is worth more than falling asleep to.
Lmao
Same brother.. I had to have a fap session bc she was bloody hot talking. The video was over after it. I guess she is the past now
I do love the dry humor woven into the ‘story telling’ and then referred to again randomly…a stand up comic schtick that amazingly turns a physics lecture into a conversation between friends. Brilliant.
Physicist humor =]
Does the past still exist? Depends on whether you remembered to hit save
Yes, I love Sabine's dry humour also. The first few times I watched her videos I didn't notice it, because it's subtle -- but it's worth watching for.
@@mokeish Not quite the same as math humour, but it's all relative. ;-)
I love (and respect) her, but I think all the puns are horrible, borderlining disturbing.
This starts to make sense when you think about how we percieve stars. If we observe one star that goes supernova 5 million light years away, and then another star that goes super nova 6 million light years away, each of those events happened a million years apart, and we just happen to be at the oberservable point to witness each at the same time.
This is the problem with knowledge and research. Some people are not naturally intelligent enough to comprehend it.
Some ask “if a tree falls and nobody is there to hear it, does it make a sound”
This stupid ‘but how do we know’ mentality reveals those who lack intuitive intelligence. It is a self-centric viewpoint.
Light exists. Light travels at particular speed. It takes a relative (i’ll use the word) duration for light to travel a set distance at that speed. Yes those two events happened, at a duration we measured to be, a million years apart. These things are true. Focusing on the ‘meaning’ of this is self-centric. Those things happened and those were the factors. But that does not mean time exists or that the past still exists. The explosion that caused the light happened and then ceased, but the light created continues. I don’t know how or what exactly causes these phenomena or if existence is finite or not or even if there IS actually a creator, but it’s the ego that drives people’s theoretical wandering, beyond the realms that we are capable of.
Time does not exist. It is merely a word we used to label a duration of moments. Time travel will never be possible in any way other than a technical way (ie. Australia are ‘technically’ in the future - but they are NOT in the future, they are in the same place, just at a different distance so are subject to different factors.
Some people will get what i’m saying here, and some people aren’t capable, as they can only grasp things through technical language, limited to the definition of said language without the personal means to interpret the grey area. Objects exist before the labels we give them, and the objects are the inescapable truth, but the language can be inherently flawed
I hadn’t even watched the video when i wrote that.
5 minutes in: “how do you know your phone is there? You don’t” 🤦🏻♂️
‘I think therefore i am’ - the ultimate self-centric expression of ego through philosophy
We don't even know if that is true.
@@mexreax4493 it's true. Light has a defined and observable speed. We can only see things through light. So anything that happens a far enough distance is the after image we are observing. Take the sun for example. It takes light 8 minutes to travel to earth from the sun. That means that if something like a planet passed Infront of the sun. We would still see the planet Infront of the sun when in reality the planet at that specific time has already moved out of the way of the sun.
Thar "old" light doesn't exist. What we see isn't the old, it's the new part of the old.
This argument is parallel to the river argument. In philosophy, the river argument states that if you step into a river, you aren't stepping into the same river twice since its constantly changing, but yet we call it the same river. The same can be applied to this. We can label the light old since it comes from the "old star". But the light has changed many times before it got to you. Therefor the light isn't really old, it's new.
I just have to say that her videos have the clearest, cleanest, crispest subtitles (cc) on YT. As an English teacher, I appreciate the attention to detail with the accuracy.
It's like a book or a movie on your computer. The beginning and the end is already there. But the people in it don't have a clue. Just like us. Since we're stuck in the 3rd dimension, we perceive things bound to time. To get out of it, we need a different form of body with a different set of new senses. Which we couldn't get until we die. So, "Does the past 'still' exists?" is like asking "Is Dumbledore 'still' alive?" On what page? Because he lives and he dies, everything all at once in the book.
EXACTLY
Nice
Except, this is not how it is.
Finale, not QUITE, if you were only living in 3 dimensions, there would be no change because there is no time... If you're only allowing three dimensions, the screen you're looking at right now is reality because you can see Sabine talking in 2 dimensions and she's MOVING... the only difference between either 5 seconds ago and now or now and 5 seconds from now in 4 DIMENSIONS is that the universe has gotten bigger,, matter and energy have gone on their dances together with the irreversible fusion of hydrogen and expanding through space-time,, meanwhile time and space seem to stand aloof since contemporary theories now speculate that the universe, or the substrate or whatever you want to call space, existed before the Big bang and the only thing we have to measure Time by is the expansion of matter, and the eventual decay of everything into first, the positronium sea in a universe beyond all comprehension of size,, with eventually at Year 10 to the 130th power AD ,, random photons neutrinos and maybe some electrons or other leptons that are so widely scattered that no interaction is possible, the universe is totally dark and chilled to absolute zero, and entropy peaks at 1... there, according to Prof Dave Darling, since there is nothing to measure past from present from future anymore, "time is - uncertain."
Fake news there is no outer space and 1/2/3 dimensions exist together but not 4/5/6etc until your there. It’s also an energetic spiritual thing. You believe the fake NASA mkultra programming bud.
What blew my mind is that when Sabine gave examples of 'now', she knew I was watching the video. Amazing, great video.
You hadn't disappeared yet.....
It's uncanny
🤯🤯🤯🤯🤯🤯
This gonna blow your mind.. but when you read this you will be watching again 😱
Time is irrelevant what happened already happened, what will happen will happen, understanding this will free you from the clock.
If time was relevant talking about this would be a waste of time.
Who else is watching this in 1950?
😅
I'm watching in the year of our Lord 3084
1950??? WOW….how is it in the future!?!?!??!
Imagine if it's not a joke and he's really from 1950 💀
@@saadshinobi3859 The question of time, does it exist, or not , is still being debated in the year 3084.
Invention of photography and motion video is revolutionary. Believe me, these are basics of time machine.
Time is a fluid, like a stream flowing in one direction. Anything with mass creates drag, causing time to bend around it like a big rock in the stream. Only things without mass can move freely in the stream at the same speed as the stream itself, and thus it doesn't experience time at all.
Oh didn't know u looked at this
Where is the start of the stream and where is the end?
@@bootre9148 It began to flow into our universe at the big bang singularity, it doesn't have an end, but can flow out of our universe through black hole singularities where time effectively comes to a complete halt as the superfluid leaves spacetime.
So if I gain mass, I'll live longer? Sounds good to me.
Or maybe it's all meaningless and isn't t special at all but useful to figure out. Maybe what really matters is that you are an observer and bring meaning to this vast messy whatchamacallit by simply living.
It's so clear when you explain it. I think I'll be coming back to this video often.
The idea that (at least) the past always exists is the only way I've been able to cope with the loss of my loved ones.
It's a called a liner existence.
We come from the past, as the future moves into the past. It would be neat to go back and fix things.
But what good is that if we can’t revisit these events
I always wonder what happens to today when it becomes yesterday!
If you can remember, they're not gone. That itself is proof enough. But the thing is, the past and future have never and will never exist, yet your loved ones have. They are not bound by space and time anymore, as we won't be when we pass. I recommend Rupert Spira or Bernardo Kastrup for further, more precise information. And I'm sorry for your loss. This won't fix the pain, but it might help you accept it.
@@SupportTheLittleGuy maybe we can! With drugs? Maybe one of this nerds can help us travel back in time, i could see my dead wife and have a good coffee with her... maybe the solution is just a shot to the head, but we have options at least
Immediately after watching this, I watched a documentary about Kurt Vonnegut, the author of "Slaughterhouse Five" and numerous other excellent novels. If for some reason you are unfamiliar with this book, it is about a man who becomes "unstuck in time". I read it many years ago. And it is the perfect literary accompaniment to Sabine's lecture.
Heh! Timequakes!
Kilgore Trout - "ting a ling"
Read the book, and, saw the film, both several times. I love that story...
I’m not a scientist but I always felt the block universe made the most intuitive sense.
Just discovered Sabine. I love her dead pan humor and style. Being a student of Non Duality (Advaita Vedanta) I find her examples so strikingly similar to the consciousness only model that it helped me understand the notion of consciousness contracting itself via the observer to experience 3rd dimensional reality and how all there is is now and our experience of this now. Thanks
"Now" is a mysterious phenomenon, it is an infinitesimal small point in the time. Most of the time we are constantly moving from the past into the future and "now" is a very small connection between these two. how big is the "now"? is it a second? or millisecond, or a nanosecond or a .............? no end to it. the passed femtosecond at this moment has also become the part of "past" but our consciousness still perceives it as present.
the "NOW" perceived by us is an illusion created by our limited perception, our conscious mind throws itself to a time span which includes the past and future, and perceives it as "now".
it depends upon the limited speed of our neurons in the portion of our brain which senses the time as "NOW"
and when a person can be in that moment of "Now" and flowing together with it, i think that is called as "Meditation".
@@dharmendrasharma6070 there is no past and future. No one has ever experienced the past so it must be as illusion of sorts. The now is beyond space time and not a piece of it as you’ve stated
'humor'
If there's no past how can we take a video or snapshot of it and keep it forever? If there's no future how do we progress with how we grow? How flowers grow/die? This is ridiculous to think these things don't exist
@@dharmendrasharma6070 "now" may not have an upper limit but it sure Does have a lower one। It cannot be less than plank's time
When Sabine casually covers the question you have always been wondering about. 😁
did nobody ever suggest you that it is ugly to end sentences with prepositions flapping about pointlessly uselessly and uglily at the end of sentences
@@vhawk1951kl you are missing the word “to” in your sentence, and “did nobody” is awkward phrasing, I would have gone with “has anybody”
@@wiseguy8828 Ah, if you please, so the fcuk what?
@@vhawk1951kl There needs to be a comma between pointlessly and uselessly. Plus a capital letter at the start of your sentence and a full stop to close your sentence.
@@peanutnutter1 from where do you get such weird ideas? - I don't give a damn about nonsense and trivia like that.
I agree. Time isn’t a factor of state change. It’s just a term that people use to try and comprehend the movement of matter. To do “time travel” you have to assemble matter into a state that you believe represents how it once was. The implication being that if you can do that, why not use the energy on something more valuable than regressing.
Time isn't illusion. Time is motion, motion is time. To move from one state to another, which is existence, requires the motion of time. Without it there's nothing, which is timelessness. The perception of time is subjective, and it's this perception which is illusory.
Time is either merely a measure of entropy or an arrangement of particles. Both can be true but both cannot be false.
But if you merely assembled matter into what it once was that wouldn't change the present because that would be a separate action altogether but your statement is very well thought out
i witnessed, in my own livingroom in march of 2021' at 5 a.m., an event(i would call it). i had already had plenty of sleep so i was laying in bed reading things on the laptop. there was an orange light reflection off of my opened bedroom door which is across from our livingroom window. at first i ignored it because i thought it was my daughters tail light reflection from her car, thinking she mustve gotten up extra early for work. a few moments past and the light was still reflecting and as i studied it, i noticed that it resembled how fire flows. of course its just light reflecting only because the window itself has a cheap plastic blind over it which we hardly ever open. next i realized i need to pee and i best not keep trying to hold it. so, i slowly sat up, reached over for my cane, slowly rose to my feet as not to get our 3 dogs awakened, and hobbled only 6' feet to my door and i first noticed the entire livingroom was dimly lit due to that orange light. then movement caught my eyes just to the right of that window and i witnessed a 4' foot long sparkling-like upside down cone shaped image that was in the middle of dissipating upwards into the ceiling. well, im no dummy! it looked exactly like the star trek old series where people get beamed up. i stood there in my doorway, frozen. i instinctively knew that if i got caught up in transference that i may get sucked in. as soon as it finished, our dogs instantly woke. i stepped into the room and hobbled to the next room to the window with the shade usually up but the orange light was gone. and it was totally dark outside. i couldnt stop there long because i had to pee badly. in the bathroom i heard my daughter in her own bathroom. back to my room i called her on my cellphone to be careful outside because i seen something and there was something in our driveway. the point is: travelers in time are helping themselves to peoples homes anytime they choose and thats not right! i always imagined there was a natural protection against that stuff, like GODS LAW. i was concerned about my granddaughter who sleeps in the room beside mine. so there are travelers
@@--legion Heidegger? You see the "nothing"? You goes "there"? In a meta+fisical way? So this is really about "being"
How i understand the "now" is with this example:
1. Person A goes on a spaceship and travels through space-time 2x the speed of person B
2. Person B has agreed to press a button 5 years after Person A has left. But because they know about time dilation Person A knows to press the button 2.5 Years into his travels.
3. When both press the button they are pressing it at the same "time" / in the "now". And therefore they are both existing in the same "now" even though they arrived there at different "speeds" ergo "now" is experienced differently, but is still the same moment.
4. If both persons had agreed to press after 5 years, Person B would press the button, but would have to wait another 5 years to see Person A pressing said button. (assuming that visual contact is instant).
5. The original button press with 5 and 2.5 years, both people would see each other pressing the button at the same "time" or in the "now".
I might be super wrong, but thats the way my head has understood time LOL. Please correct me if its wrong.
Fellow dum dum but this makes sense to me. It doesn't compute in my head the other way that they are experiencing different "nows" even accounting for time moving at different speeds.
Even though I watched a lot of science videos it is the first time I heard about the block universe. Well explained. And now I am mindblown.
If the past doesn’t exist then why is my wife still mad at me for leaving her car lights on 12 years ago?
Because she has not learned to forgive and forget.
@@DiscipleofHim😂😂😂
Checkmate
If that's all she's mad at you about.....
COUNT YOUR BLESSINGS!
It’s because time is stacked and she technically still mad.
Also notice that our memories can have differences in this manner. My memories of 50 years ago ( I am 80 ) are in a distant past...but the things I did, that I wish I hadn't, such as being rude as a teenager to someone, and we never forget, is as if it was yesterday.
@richclarke1523
Hi Rich, it was so good to read your comment! I hope you can at least find some comfort in the fact you remember your rude teenage years with regret. It means you've gained the empathy that you lacked in the past. You should feel good about that, since so many people still have not evolved from their bad behaviour. And even worse they have no self awareness, and they have no clue of how others perceive them.
I have forgiven you
Because the human brain is unbelievably flawed
Regretting your rudeness for so long I bet you are forgiven
That has nothing to do with physics or time as a physical constraint.
Also shouldn’t that answer the question of the video? If you remember something as if it happened yesterday, then why would you doubt that the past exists?
I was with you all the way until 0:22…..I can now tell the future thanks to you though, because I am going to the pub in 15 minutes to drink heavily to try to make sense of all this.
So happy this came up in my feed. I have always been interested in math, physics, and engineering, but am nowhere near smart enough to have had any success studying it. So happy there are smart people who are able and willing to explain it to dummies like me!
If you’re interested in this, in any way, you’re not a dummy😀
Don't put yourself down
Same
I was always too scared to pursue science for higher studies tbh. Most people are. None of us are dumb, since we're all humans lol. You just have low self esteem, you're not dumb ♡
the dummies are those with no desire to learn at all. you’re smarter than most without even knowing
I truly enjoyed this, the dry humor, the information, and the speech. It’s very unique. I would gladly take a masters class with her as the teacher.
I agree. Her jokes land so weirdly funny.
If you know any, ask a grownup to explain to you why nothing can be " *very* or nearly(as is occasionionally heard) unique" - see also *very* pregnant or *very* dead. I am a little puzzled that you appear unable to understand that, but seemingly you have no idea what unique means.
@@vhawk1951klsomeone can be very pregnant, and something can be very unique. Something can’t be very dead though.
@@MrZorx Only an imbecile would say that
@@MrZorx Ask a grownup that speaks English to help you; pregnant and unique are absolute terms like on or off and dead -thus very unique and very pregnant are no more possible than very, on very off or very dead. Whoever says to you than an object is very or nearly unique is either an imbecile or an American, but then most Americans are imbeciles and I have never met one that can speak English similiter very or nearly or quite pregnant, and anyone that tells you otherwise simply cannot speak English and is a halfwit. You will occasionally hear 'very' pregnant when used to describe a woman that is obviously pregnant, but it is simply bad English.
Unique means that there is *only* one which it either is or is not which is absolute, but you will hear the lower classes and those that are simply witless say nearly unique and that *because*they are witless members of the lower classes and do not understand what unique means, nor understand anything about absolute and relative terms.
This woman can literally talk about anything and my concentration will never break
Not ugly too.
@@fidacuca Thanks because she is AI and not a real person
@@rudolfvenema7815is she really? It’s scary I have to ask lol
@rudnoolfvenema7815
@@fidacucawomen dont exist to be pretty. The more you know
You are extremely intelligent in articulating so many different aspects and POV in a small video
As a working class layman, thank you for making this topic more accessible to me.
The fact that time exists, no matter where you go in the cosmos, you can't outrun time. You can't not exist without it, or you won't exist to know that? Its all important, and may be the actual being, we call GOD. It witnesses everything at once. Isn't that God? Its every where at once.
@Dankenstein not a comedian.
Suddenly @Dankenstein is interested.
@@Rockhoundingcolorado Nop time as we know it is just a mere creation to God. He is far beyond what can ever imagine.
@@arkeusalexander9054 Well you, your just talking, I hear no theory other than cult Christianity?
@0:06 While I will avoid the debate of time existing or not. If we simply focus on the title of the video, well, does the past exist? Yes. Yes it does. Proof: If I look into the night sky at Sag A, well, I am not seeing Sag A tonight, I am seeing Sag A as it existed 25000 years ago. If I am looking at Betelgeuse which rests 643 light years from earth, well I am not seeing Betelgeuse today, as I am seeing Betelgeuse as it existed on 11/22/1380. Now, if there was a planet around said star with life on it, and my telescope powerful enough to see said life form I would be seeing said life form as it existed in the 14th Century, and vice verse.
When you see a star light, you see the star or the light of the star?
Such a cool coincidence that I found this video today! Just yesterday I was thinking to myself that the past is no more real than fantasy. Specifically I was thinking about my city, the version of it that existed 20 years ago, and how that place may exist in my mind and the minds of others, but so do Oz and Wonderland, and none of these is a place one can go.
I’m glad to be challenged and informed on this at the same time!
I can understand how you would proceed if the past is fantasy but you can't take it too far because there's one key difference. That difference is things that happened in the past actually did happen and they have an influence on the present and since things that were done or bills or said in the past can still be a witness today that that means the past is never truly gone.
@@charlessands6933
The past played a big part in what's going on today and why.
Which city are you referring to?
Ah. Yes... If only the past was really gone... but alas the past is now and the past is the future. It is all ONE. Peace my friend.
The only caution I would add is...the past does, in fact, exist now for some place/time, but this is not necessarily compatible with saying that it exists in our minds. Our minds do not contain the past. They contain perceptions or conclusions only. They are mere interpretations and can be and likely are ALWAYS "wrong."
Example: Newton was wrong when he came up with his equations and laws. He thought he was right. Many thought he was right. He was, indeed, possibly partially right, but he definitely was not correct.
Nor is ANY perception that we have actually the "real" correct perception. It is both incomplete AND wrong, due to our lack of knowledge and our incorrect assumptions that some things are one way, when they aren't.
The title kinda made my heart drop for some reason
I just bought your book, “Existential Physics”. I can’t wait for it to arrive! You are such an inspiration to me.
I think you should look for a refund on the book . Anybody that would use that Albert Einstein as some kind of example in a physics sense of the word is more than CLUELESS . Einstein was. created by the J's in the same way Pop -acts are created today. !
If I understand correctly, your book arrived at the same moment you bought the book.
Its 3.00am and I couldn't sleep. Just watched this video and at long last I understand Einsteins Relativity theory. It's like a mist had cleared. After decades of uncertainty over it you have now explained it! Thank you so much!!!
That will be $1.00
Now what that bill is worth is relative to the year you give it out.
It's exactly 3:38 for me, theoretically, me and you have experienced something in our lives that contributed to the experience just a few minutes a part we just went through, how interesting
Dear Mrs. Hossenfelder,
Thank you for your work and efforts in the service of educating the public while making the concepts accessible to a large audience.
Not large enough 😂
would she get 800 000 views in a loosely fitted floor length frock - nah; she's even asking for donations; note all followers are men
* Dr Hossenfelder
Filosofía ejercitada, esto es:
I. La idea de Tiempo, hipóstasis del concepto.
II. Mecánica Clásica.
III. Aristóteles.
IV. Fundamentalismo científico.
I have watched many videos about physics trying to understand all this. Without doubt, this one is the best explanation in simple terms that I have come across
Watch DR WHO lol 😆
Better look forward.
How did the TH-cam algorithm detect my existential crisis?
Because the same thing that created the algorithm created your existential crisis.
i just want to be happy😭
What the fcuk is an "existential crisis"?-Some form of hypochondria?
TH-cam knows all.
Data from across the web and sensors in your phone that monitor your behaviour. You can turn them off in your phone settings.
The past is impacting me as much today as it did the moment it first happened. When people say that someone should forget the past, they are not aware of the impact the past has had on the individual in question. We should have individual sovereignty because we are each, in and of ourselves, an individual cosmos that is still learning about how to take responsibility for the planet and its inhabitants.
That's not true. You're not the same individual as you were in some point in the past. You have more entropy now and you cannot undo it.
It is true. Simply redraw the conception of your individuality with some interesting axes, and voila! Oh and also be born into a certain tribe who controls publication lol
It's our past that makes us
@@ernestbean2998: True!
Julia: I am exactly the same on that theme. It is as though you are describing me. I am very much a product of my past.
The humor! 😂❤❤❤❤
Lovely video! I watched the video NOW!
I like the down to earth explanations. The greatest indicator of intelligence is shown by someone who can explain advanced ideas in such a way that anyone else can understand. Superb!
The fact that time exists, no matter where you go in the cosmos, you can't outrun time. You can't not exist without it, or you won't exist to know that? Its all important, and may be the actual being, we call GOD. It witnesses everything at once. Isn't that God? Its every where at once.
@@Rockhoundingcolorado Maybe there is no GOD. we would found life outside our solar system soon. you cant prove GOD exist , but you can prove science exist.
@@pttimothys life is a virus, and life evolves. Just like a virus. So where it exists, there is no stopping it. That could be why we are at the outer edge of the cosmos, instead of at its heart?
@@pttimothys Well by god, I mean creator. I don't think it has any power beyond our own. Thats why it can't enter act directly with its creation, and we, if its true that we are a creation. Then the same elements that we are subject to. So it would be like gravity, heat ,cold, If time is this all seeing all being.
Then it is constrained by the same elements we are. Except time, which it can access like a computer. It may even relive the events in its minds eye at will.
@@pttimothys What WEBB is telling us, and showing us. Looks like a giant neural network. Perhaps it is? If something would have created life, they would have hacked that to do it.
The information earned a thumbs up. Sabine's sense of humor earned a subscription. Sharing this with my software dev buddies.
Dr. Sabine, you're a natural science communicator. No other source imbues me with such deep insights as your videos.
She is a straight up deceiver ;-)
The speed of light is not constant, but it strives to the maximal speed in vacuum which IS a fundamental constant of the Universe.
i need to go to bed.
😂
😂😂😂
No, stay here. I need wake up in 3 hours.
Especially after 3:33
😂 Best comment on TH-cam
The past existed once as now...This topic is too mind bending, and perplexing for someone like myself to comprehend. Great video 👏 You are a brilliant woman 🙏
Excellent treatment of that point in "Spaceballs".
@@williambowling8211 Great minds think alike. Now? When? Just now!! But that's then?
It's similar to calculus where you integrate each slice of a graph. With time each slice is a moment. When you 'integrate' them all together you get regular time.
Aside from the similarity between the breakfast I was eating as I watched this and what my brain felt like at the end of it (scrambled eggs), I was truly enlightened, as always, and thankful that Sabine has created this YT channel.
My chemistry professor called theoretical physicists "those theologists in the other building". I totally agree. Science begins and ends with observation, not with theory.
@@kvdp9543 you're utilitarian to the point of ignorance
I’m not sure if you mean that you were eating scrambled eggs for breakfast or if your brain felt like scrambled eggs after you ate breakfast.
@@FF2Guy Both, probably.
@Javi Oz Why is that different to religion?
Not now that the internet and digital world exist it changes everything. We can go back and interact with something we did yesterday , alter it , continue or discontinue a conversation , interact. W it differently to determine our future. For instance if I leave This comment and never come back to it my relationship in this timeline of events it’s over ….but if I ask this nerdy strange lady out on a date and she dms me yes , then I enter a new timeline that didn’t exist until she DM’d me . Hopefully she won’t break my heart or I’ll be stealing her Time Machine
Is kind of humbling that things like time or gravity we are only begining to undestand how those concepts work but have absolutely no idea about why work and what creates it.
Being humble is true freedom
Speak for yourself when you say 'we" don't understand what creates the laws of nature.
I will have to watch this multiple times to understand my own example of this to confirm that this video is correct. I love this type of content.
to 114: all it means is that when something happens (the "now"), it takes time before you see it. Because it depends on the light reaching your eyes, which takes time. So, you are late seeing it. Therefore, when you do finally see it, the event or some thing may not even be there any longer. Or it's in the next "now" that you don't yet see. So we are always already in the past. This is more obvious at long distances. For beings living on a planet a biilion light years away from us, Brahms 1st Symphony has not yet been composed or heard. It's still in their future! They will hear it in some millions of years. They will observe it then. If they're as smart as Sabine, they will know that Brahms' 1st was written long ago, by those called "humans". But it's not true in this sense: they may well see my grand- parents in some millions of years but my grand- parents are no longer living their organic life, and not being conscious. The distant inhabitants will not be able to insert themselves into their lives.
@@nicolasdelaforge7420 This is not correct. The observational delay you are focusing on - due to the fact it takes time for light to travel some distance - can be realized while still falsely thinking time is absolute. It is essentially no different than the fact in everyday Newtonian physics that it takes any object moving at any finite velocity some finite time to move a finite distance. Special relativity says more - that time itself is a frame-dependent coordinate. Time is not absolute. Two observers in relative motion may agree that a photon from a distant star must have actually been emitted sometime in the past, but they will not agree on *how long ago* in the past it happened.
In fact, the first observer will not agree with the second observer even on what the spatial distance is between the star and the first observer - spatial lengths are also different in relatively moving frames. (You might have heard of this referred to elsewhere as "length contraction".) This allows for a new notion of "distance in spacetime", usually called the spacetime interval, to exist when all four coordinates are combined in a special way. This the two observers *do* agree on, though they disagree on times and spatial-only lengths considered separately. Though Sabine didn't have time for that in this video, it comes out of the same mathematics that forces time to be frame-dependent.
I love Alice!! That was a great example of why I love Prof Hossenfelder's videos. Not pure technical talk. A touch of humor as well. Well done and thank you!
Everything is seen in past tense. Light travel time plus our nerve response time to compute in light data coming in which then goes chemical response, nerve electric response then chemical then electrical then response recognition signal. This does not happen quicker than speed of light. So all we see is delayed and past time.
@@Smokin4CHRIST She addresses that in the video. The point I take away is that since there is an observation frame from which things that happen "now" for us either have not happened yet, or already happened, there can be no definitive determination of "the past." We can only talk about it in terms of our framework.
But if I REALLY understood this stuff, I would be a professor too LOL LOL
Outstanding video, brava! Yours is a fabulous production that addresses a rather complex subject in a fairly easy-to-comprehend fashion (along with a pinch of humor that renders the discussion delightful). Thank you so much for the upload.
P.S.1- I adore Frankfurt, where I resided for about four great months, millennia ago (1994).
P.S.2 - Will your publication be available as an audiobook? Cheers! //////////////////////////
Hervorragendes Video, Brava! Ihre Produktion ist großartig und behandelt ein ziemlich komplexes Thema auf relativ leicht verständliche Weise (zusammen mit einer Prise Humor, der die Diskussion unterhaltsam macht). Vielen Dank für den Upload.
P.S.1: Ich liebe Frankfurt, wo ich vor Jahrtausenden etwa vier großartige Monate lang gelebt habe (1994).
P.S.2 - Wird Ihre Publikation als Hörbuch erhältlich sein? Prost! /////////////////////////
Excelente vídeo, Brava! Sua produção é ótima e abrange um tema bastante complexo de uma forma relativamente fácil de entender (além de um toque de humor que torna a discussão divertida). Obrigado pelo upload.
P.S.1: Adoro Frankfurt, onde morei durante cerca de quatro ótimos meses, há milhares de anos atrás (1994).
P.S.2 - Sua publicação estará disponível como audiolivro? Saudações!
Subscribed!
Time and space has always fascinated me. I remember in college being told that the light from the stars we see now left thousands of years ago .so I thought, well, suppose the world ended at the furthest edge of the universe. we wouldn't know that for millions of years, so maybe the world has already ended, but we don't know about it because that time and space haven't reached us yet. Any thoughts on this?
I think you mean the universe ended. If the world would end we would know immediately since we are in it.
@@cmunoz810 I kind of used those 2 words interchangeably
That's exactly what it means. Search for videos about the "vacuum decay". It is possible that the universe is only in a semistable state. If it is true, at any moment at any place it may switch to the true stable state. However, that would mean all matter is destroyed, because some basic properties of physics would change. And this effect would propagate itself through space like falling domino blocks at the speed of light. So, it is possible that it already happened somewhere. And this "wave" of termination races towards us at the speed of light. And there is no way to detect it, before it arrives and everything (in our fragment of spacetime) ceases to exist.
Same application in the subject of Jesus existence and that light a reference point.
The time ( past ) is stored in the light . but we will never be able to see the past only aliens who are far away from us can see our past , but they will never be able to see our presence .
Man findet heutzutage absolut selten Leute und Videos wirklich wert anzusehen. Dieses Video ist eine solche Ausnahme. Das Thema, die Präsentation, die Erklärung, die Recherche - absolut top! Schade nur, dass man nicht persönlich eine Debatte entfachen kann - die wäre durchaus sehr produktiv. Alles in Allem - sehr empfehlenswert!
I followed your Quantum Mechanics course in Brilliant, it was truly a gem :)
Sabine, viewing from Perth, Western Australia. Many thanks for your excellent video.I look forward to reading your book in the near future. King regards, Noel
Richard Rohr says that if things we derive in systematic theology are true, then we should be seeing them in science too. I've watched this marvellous video several times, and I can think of about five. Excellent!
Not true, it was Richard Pryor 😂 and he knew what he was talking about...😮😂😅
What five did you come up with?
The problem with systematic theology is that, no matter how 'systematic' you get with it (and how many Latin or ancient Greek based scientific-sounding terms you create within it), it is still ultimately based on source material of dubious origin or reliability. It is exactly the same as a 'systematic' approach to studying Moby Dick or Harry Potter. For example, in systematic theology there is a category called "Pneumatology" which is the study of the Holy Spirit. I could make up a fancy word for 'the study of the ghost of Christmas past' and use Dickens' "A Christmas Carol" as my authoritative source. None of it would have any obligation to align with reality in any way, though I could make it, with enough imagination.
@@Daniel-Strain Exactly, in other words, if you can convolute a subject, any subject, enough to where 98% of the general population feel it's beyond their capabilities to understand, you can't get away with anything. I can deal with Moby Dick, mainly because it has the word 'Dick' in the title, and I know for sure it's pure fiction, but try to explain to people that theology is a bit of fiction as well, good luck with that...🥴🤣
Sabine, you are one of my intellectual heros.
What we consider the present is perceived recent past. This is why is is so difficult to truly be in the moment. Our brains are always in catch-up mode.
Wait. Can you say that again? I didn't quite catch that?
The older you get the closer our brain is to actually catch ing up
I love how you pepper this serious discussion with humor bombs! Thanks for making such complex ideas more understandable!
Yup! She thinks her left side isn't as beautiful as her right side
You mean like pronouncing it 'eyen shhtienn'
There's an alternate universe where this female is physically attractive
@@yourlogicalnightmare1014 She is beautiful
@@mtlicq Yes, I noticed that.
She'd be great to go take a 'trip' with.
She'd blow my mind.
I wondered when the conversation about time travel came up my question was if you go back is anything there? Or is it just an empty void
I know this might get glossed over, but I think it is interesting to think about what constitutes an observer. I think biological observers are scaled up, and the potential for an observer can be found as far below as a subparticle. For something to interact with universe (collision or force) besides the mass that would allow it to do so, the position it holds also counts. Having each particle observe allows each particle to interact whether it contains mass/force or not. Observing a particle would collapse its wave function, however a particle does not need to observe itself unless it was observing something relative to it like hearing involves not just the position of the sound but also the observer. It seems weird to imagine a particle could "hear", however it would explain hearing itself if we were able to scale down a system to the size of a particle. In other words, nanosensors right? I feel like it has already been done, and I am just dense.
When I think about the past. Technically the speed of a human thought is roughly as fast as the speed of light. (Neurons firing sparking a chemical reaction producing the thought) Therefore it is possible to subconsciously travel back In time because the speed of your thought got to the past, in “no time”
Every moment exists as its own point time passing over like a film layer giving us the illusion of life
except there's no film to review.
@@GP-yc2it different dimension
@@GP-yc2it its not about the review. Its about the experience.
Yeah what he said 👏
here is an exercise i created for my students back in the seventies on the validity or non validity of past and future.
Think of something you did yesterday . Now ask yourself -" when am i remembering this past event ?"
Now do the same for a future event , say dinner with a friend next week .
ask yourself again ," when ami i thinking about this future event ".
the answer is always NOW . repeat in five minutes or five years , the answer will always be NOW.
this of course doesn't prove that there is only now , but it certainly might makes us question the validity of past and future .
This is likely the best TH-cam video I've ever seen on Einstein's 'Theory of Relativity'. Sabine's lecture simultaneously linked with graphics has made it so much easier to understand.
I must be dumb, I still don’t understand how I could see the future of someone while he sees my future ...
@@xrayban2 -- LOL! I was just about to post something similar cause I don't get it at all
OMG this is a truly incredible video, best one I have seen on the subject. This really is an incredibly good lecture. I have been studying this subject for many years, back then most of what I worked with was in Physical Review D and books. Some great books out there got me interested in physics and math, but I am very impressed by this video and the deep subjects you talk about. I was a math physics major, though the truth is that most of these fascinating concepts can be understood through thought alone.
The math is certainly interesting. I had to see how it worked. The Tipler cylinder was my first interest, in the math model it is infinite in length so it does not collapse into a black hole. Anyway we know that time like coordinate becomes spacelike and spacelike becomes timelike, but I had to see the math.
I used to talk to Tipler, and Gott on the phone way back, then later I got into Caltech though I did not go. In any case I study this stuff for fun, and this video is magnificent. BRAVO.
In a way the past does exist and we can re-live them in our memories whether they are good or band moments. The past may not exist physically but it does mentally.
Sort of like turning an egg into an omelette the complete egg doesn't physically exist anymore as it became an omelette but we can remember it as a complete egg.
The fact that time exists, no matter where you go in the cosmos, you can't outrun time. You can't not exist without it, or you won't exist to know that? Its all important, and may be the actual being, we call GOD. It witnesses everything at once. Isn't that God? Its every where at once.
It does exist
But in a different dimension
Spinor time 7:27 it feels
10:49 - Additional dimension space-time-viewer
12:37 but all times exist simulatenously in the same way
Thank you, Sabine. I am even more taken back by this place we find ourselves in. The beauty and mystery always seem to deepen. Answers seem to always create new questions.
@ilkldme yeah, I need some of that, myself. My particular universe is far, far from beautiful... so, yeah, I _really_ need a few hits of *that!*
@ilkldme I'm not smoking anything and think being conscious and experiencing this "reality" is beautiful.
Maybe you just lack gratitude?
@@LuckyFlesh - I agree with you, Lucky. Some people seem not to be able to evaluate, appreciate, reciprocate fruitfully. They seem to lack imagination and seem to be stuck in a (social, theoretical, ideological) box and if the course of events doesn't match the expectations generated by their mental model, they are frustrated and unhappy (and sometimes vengeful) instead of enjoying the sublime awe and wonder of the flow of everlasting TAO, LOGOS, RTA, etc. that produced them and their capacity to model and everything in the first place. By their fruits, ye shall know them. Cheers!
@@TorMax9 Very well said.
@@LuckyFlesh Gratitude for what?
I once heard the block universe described as the "view from nowhen" and I still think that's once of coolest phrases. The graphics in this video did a great job of showing it along with the concept of time sliced at different angles
Or the view from everywhen...
Summed up much easily ‘Time passes because we age’ Thank you!
block universe makes sense just from observation. we see time and space are one, thus the further we go away is just going to the past. thus far away “past” is now there. thus they both exist at the same time -> it’s not actually the past! it’s the present. just a different location. the edge of the universe is the big bang.
I've been metal detecting for 35 years. Each time I find a roman coin or medieval buckle I'm always aware I'm the first to see this light since it was lost. A direct link between Two periods of time.
Time is⁸ nothing but a measurement, Ubuntu it has no matter, atoms, volume, mass. 6TH GRAVITY can slow down clock's or other mechanisms that measure time but it can not have a effect on time.
@@larrywright1589 'time is a measurement' and 'gravity slows down what the measuring devices measure' don't go well with 'gravity has no effect on time'
When coin was laying underground , time was frozen. But when you find it, time for coin began go fastest, coin began moving. Conclusion: time is energy. i've been writing program's also for 35 year's. Each time i write line " if i found coin then BEGIN ... END" i know that time for part between
BEGIN .. END is frozen but not between if and BEGIN. And when found, then energy of processor touch BEGIN and time go fast between BEGIN .. END. Surely in computer time is energy of processor.
@@АндрейДенькевич how long did the coin lie under ground???
@@larrywright1589 time was frozen, therefore have not longitude . It's link between Two periods. Answer: 0s for coin. But for other's i don't know.
Time is abstract meaning of energy.
Time is called always time, but energy is usually called differently for different kinds of energy.
Bravo! I have never heard such a good explanation of the Block Universe! Now this saying makes perfect sense: Time is a thin line of perception through an infinite universe of happenings.
The fact that time exists, no matter where you go in the cosmos, you can't outrun time. You can't not exist without it, or you won't exist to know that? Its all important, and may be the actual being, we call GOD. It witnesses everything at once. Isn't that God? Its every where at once.
@@Rockhoundingcolorado you can’t just name something god
@@Chuked Sure you can.
@@Rockhoundingcolorado Unless time is sentient you couldn't call it God.
@@larryoxentine8310 How do we know its not. Its not only self aware. Its aware of everything thats ever been done. By anything. A voyeur of everything..
yes, agreed - to me the most obvious factors here are - the earth's, sun, moon, stars movements, bringing light & dark & the seasons
plus our own self-reflection, awareness & language, giving us the realisation that we are mortal & so time as a
construct is essential for us to do things meaningfully, to plan ahead & remember the past within a "time-frame" -
- but all of that IMHO does not make time any more real than any other human constructs or perceptions
Indeed!
Her voice is so calming.....it's like physics singing
Interesting. I don’t have the mathematical/physics knowledge that you do, Sabine, but I understand the gist of what you’re saying: Essentially that what we perceive as “now” is actually delayed by some tiny micro-fraction of a second from the moment that it actually occurred. That makes perfect sense to me.
What I actually thought you were going to discuss (or you did, and I didn’t get it, LOL!) was whether or not what happened in the past still exists in the past: in other words, could one travel back to the past and witness what happened, watching it, even physically touching it in real time? We can already watch it to a degree: Photographs exist. Film and video exist. That’s almost like a form of time travel in that it captures a moment in time that we can perceive with our passive senses (sight, sound).
But could we go back and touch it, interact with it? Does it still exist on some dimensional plane that is tangible? Is someone who passed away years ago still alive in the past? Could a time traveler speak with him and be understood by him?
That's why I started watching, for that information.
Thanks for saving my precious time!!!
I wanted to know does the past, present and future operate simultaneously with each other and are they all equally valid - or have we only the present? If the past exists, then are we always going to be alive somewhere?
@@periwinklecarruthers6470 - I think that’s likely - or it’s only my time travel sci-fi fantasy - but I’d like to think it’s true!
Reality is a feedback loop.
th-cam.com/video/hAdLe841qYw/w-d-xo.html
Something like this:
Time might be somewhat though not exactly reversable within small isolated systems and ~great effort~, which we may be able to externally observe.
In replaying that timeline we could plant a clue in the form of another isolated sub-system
which they could read and then alter their behavior.
They could communicate back only by dissipating energy out of their system into ours,
which we would have to replenish and then some to keep their timeline growing.
I suspect it quickly devolves into any number of clues and timelines where whatever you were looking for ceases to have much meaning.
And when you start seeing all the clues before you even start the experiment it becomes rather ghoulish.
What an amazingly clear, concise, uncluttered, unmuddled description. You truly are ‘brilliant’!
???? I didn't understand a thing she said 😂😂
So, same principle could apply to sound. Someone firing a gun would hear it the moment they pulled the trigger (that observer's "now"). Another person several miles away would hear the same gunshot a few seconds later. The gunshot is in the past, but actually, that event only exists then for that observer.
Yes and exactly the same is true for light. But, contrary to Sabine’s theory, I can’t see how that would mean that a past event still exists, rather, I think that the emitted sound, light, radio waves travel through space eternally and can be observed by whoever is at the right place at the right time. So I don’t think we can travel time, but we could possibly fly away from earth at the speed of light and then receive the world’s TV and radio program from the 70ies.
Yes, but how about if the sound is blocked somewhere between the source and the person who could hear it? For that person, there was no gun firing. Same if the the light of a star somehow can’t reach us because it’s being blocked. For us, that star simply doesn’t exist.
So the whole thing about time is the light that travels from the source to you, but if there is no light to see, then you can’t see the past and it just don’t exist anymore.
@@maxsteinhausen2197 - How can you travel at the speed of light in order to catch up with TV and radio signals traveling at the same speed of light? You would never catch those signals. So, you would have to settle on sitting in one place and waiting for broadcasts of reruns to reach you.
clicked on the video in regards to existential crisis, stayed for a surprisingly great set of ta-tas
Something I've pondered for a long time is how events in the past essentially cease to exist as we know it. I have lost people and pets in my life and cant help but wonder is that it? All the memories I have attained is what's left and nothing more? The individual moments have just fluttered away? The more I think about it the more odd it seems.
Events are like matter and energy. They do not cease to exist, they just change form, but they are still there.
you're on the wrong channel
Energy is never destroyed, energy is information. Thus, information is never destroyed. It's all eventually encoded on the event horizon of a black hole, of which there are an infinite number, most of which are no bigger than a plank length, and encoding one bit of information.
The answers are written in the Bible.
I know most of you think science has all the answers.
Just think about it. No big bangs have ever recreated anything other than destruction.
The grand architect the almighty created this all.
The ultimate proof I can explain.
It takes a male and female to make a human. But how did the first man and woman arrive?
Better yet the first male and female did they start out as babies?
We know that a baby cannot feed itself or care for itself for the first several years of its life. So how did the first humans come to be?
It's written in the Bible God the creator made Adam and Eve.
With this question, I think many would think of 'present' in terms of the conscious experience of 'now' rather than in terms of where physical stuff might be.
Dont eat for few days and hunger will proof to you present is real.
I think it's both. It's also what state we and the rest of stuff are in, after events of the past have occurred. In the future what's happening now will leave its mark too.
i dont see what that changes really. Wether you pick the “now” where you’re thinking a certain thought or experiencing a certain sensation OR you pick the “now” where some things happen to be in a certain place, all the rules are still the same.
It’s still possible that some observer in the universe can observe you thinking about my comment and see it as happening at the exact same time as a supernova that happened millions of years in the “past” from your point of view.
The conscious experience of 'now' is the result of physical processes in your brain, so they are really the same thing
Nobody believes the light we see from distant supernova explosions came from an explosion now. We all intuitively use "now" to refer to the local time of the event occurring. We see it now, it happened years before.
The fact that we can't definitively know now, because everything happens outside the now of our delayed brain's local time, while as uncomfortable as any other conclusion of skepticism, is not a rational reason to believe other counterfactual theories that would allow us to believe we have real knowledge.
Time is experienced two ways: Chronologically or simultaneously. If you wish you can look at a clock and not think about anything but the seconds that pass in order, or you can think of a number of things at the same time. To say that the past exists is to say that it exists perfectly, ready to be experienced and/or observed perfectly with nothing missing at all; if even the smallest thing is missing or altered, it's not the past- it's something else. If the past still exists, it would be nice to know how to access it just for entertainment and reflection if nothing else. Great topic!
You’re so brilliant 🥰❤
The past is a series of events that cannot be replicated
@angelita1895 Right!! Maybe versions of the past exist?? Then it would have to be acknowledged as something else- not the actual past!! Thank you again- you made my day!
I remember taking pictures of my grandmother one Thanksgiving in 2017 and with the family something felt special at that moment it was beautiful. The following year 2018 in September she passed away.
I look at those pictures today of that special time and still feel like I'm in that moment!!!
My mother passed away a month and a half later and I can still feel like I'm holding her hand on her last days, I feel it like it was yesterday!!!
@@edbaiza7757 That's so beautiful and very powerful in many ways- my condolences on your loss and I'm so grateful for that wonderful memory captured in time; may it last forever in your heart and mind!
Bewitched effect……. Think about it, Samantha went back and forth in time. All time lines exist simultaneously. Fact…..
Long ago a thought occurred to me about those films my teacher showed our class in grade school that being that the roll of film was all of time past and if you could pick a point or place along that roll is being a point in the past which you could hypothetically look at or even experience. Now it's interesting to see a smart person talking something in those same terms or similar thought exercise. Thank you for your 'films'.
I could listen to Sabine talk about this topic, time and time again.
The block universe idea has comforted me for years. All the dead people we know, are still doing things with us "now".
REAL LADY SPEAKING OR AI ..
Yes as Energy or the Negative charged electrons but our human life span isn't a Mini Micro Blip coppered to all of all Existence. So it still nothing. Like the amount of Electromagnetive waves that Negitive Charge releases and we only see the visible light spark. it's absolutely Nothing to the whole
It's "now", and the information of "now".
Now is just a Micro Nano Second moment moving through Space/time. it's gone before you can count it because Negative Energy is always moving towards the Positive.@@Flylikea
Huh. U see dead people? 😮
The past is the remembrance of change; the future the anticipation of it and the present what makes us aware that change has occurred.
Thank you Sabine, for weaving your wonderfully dry sense of humor into this brilliant explanation!
Her subtle humor makes it so much more enjoyable
@@andredelacerdasantos4439 This is so true! She really and truly has a gift for this!
The differences in the now and all nows existing at the same time for some observers feels mindbending, but is not really as amazing as it sounds. Space itself should be the great equalizer here. If for example our earth 1000 yrs ago is the now for something somewhere in space, it should still take a 1000yrs to bring these two together.
this
Best comment here! So there is no advantage to live in the same "now" (1000 years ago) far away, if you can't reach the place "now" an so you can't have the experience of the same "now" which is 1000 years away from you.
@@FeanorCC Thank you. And even if you travel to that other place faster than light, still the same time will pass. Space really doesnt like paradoxes.
@@magichands135 And it is precisely this fact that reassures me. Remains only the mathematical possibility of wormholes. That could trick the space... 😱
what do you mean by bring these two together ?
I just have to say. I LOVE your sense of humor. Your videos are great regardless, but this just adds so much more. The frosting on the cake.
If Sabine's the CAKE & consider me, a frosting on top of it.
Sabine do you love this experiment in LAB or somewhere like, you choose the place for this experimentation & let me know.
There is a great significance to the passage of time
So why does Einstein arbitrarily call "now" the moment at which light hits the mirror? Isn't actually the instant the light emanates from the observer?
If I understand this correctly, when I observe of an object at a distance from my "now", I really am viewing the object's "past" due to the light having to travel. Also I have just pre-ordered your new book and look forward to reading it. Thanks, Sabine.
The big bang is a Janus hole/point -- Julian Barbour, physicist.
White holes are dual to black holes.
Janus points = Janus holes.
Points are dual to lines -- the principle of duality in geometry.
Janus or two faces = duality.
Topological holes cannot be shrunk down to zero -- non null homotopic.
Gaussian negative curvature is defined by two dual points -- non null homotopic.
Positive curvature is dual to negative curvature -- Gauss, Riemann geometry.
Curvature or gravitation is dual, gravitational energy is dual.
Potential energy is dual to kinetic energy.
Apples fall to the ground because they are conserving duality.
Gravitation is equivalent or dual (isomorphic) to acceleration -- Einstein's happiest thought, the principle of equivalence (duality).
Antinomy (duality) is two truths that contradict each other -- Immanuel Kant.
Space is dual to time -- Einstein.
The future is dual to the past -- time duality.
We predict (syntropy) the future and remember the past.
Time dilation is dual to length contraction -- Einstein, special relativity.
Energy is dual to mass -- Einstein.
Dark energy is dual to dark matter.
From a converging, convex or syntropic perspective everything looks divergent, concave or entropic -- the 2nd law of thermodynamics.
All observers have a syntropic perspective according to the 2nd law of thermodynamics!
My syntropy is your entropy and your syntropy is my entropy -- duality.
Syntropy (prediction) is dual to increasing entropy -- the 4th law of thermodynamics.
Teleological physics (syntropy) is dual to non-teleological physics (entropy).
Homology is dual to co-homology -- topology.
Decreasing the number of dimensions or states is a syntropic process -- homology.
Increasing the number of dimensions or states is an entropic process -- co-homology.
The 4th law of thermodynamics is hardwired into mathematics.
Convergence (homology, syntropy) is dual to divergence (co-homology, entropy).
"Always two there are" -- Yoda.
Duality creates reality.
That is correct. This was covered in more depth by the much older documentary series "The Real Thing" by James Burke, which dedicated an entire episode to the problem of light taking time.
@@hyperduality2838 Anus holes. Lol.
Take a picture, lets go with a 35mm camera with a horizontal shutter. The image on the one side of the picture is slightly different than the other side. Depending on the speed the shutter moves, it could be 1/200th of a second different. Anyway, I'm not going to rattle my brain over time. It exists so matter can move.
In the block universe - you've just now explained this 🙂 And I appreciate the humor in the examples. Brilliant!
I think of this alot, sometimes I think of my past experiences and whether they actually happened or not. Sometimes I feel like time is like a line, we can see the point in the line we were at, but we're at a point in the line where we've past it. Almost like a space, I cant explain it, but it causes me to wander off in my thoughts.