A speaker who can expound at length, without notes; just a few slides to set the course for himself, and the audience. That alone makes this presentation a pleasure. But the content of Keith Cooper's talk is well worth our attention.
My favourite part of his lecture is around minute 32, when he talks about just how far (or how NOT far!) our radio signals have penetrated our galaxy. It's barely -anything-! I was glued to this lecture for the entire 51 minutes. Thank you, Keith!
@maximumchron They're probably not capitalist either. It is unlikely their economics work the same way as our do. Ours are substantially different from a century ago, let alone a millennium. They may not even have a concept of money.
@@anonb4632 Maybe they are at the point where they branch out on their own. Kinda like "Amazon" building a spaceship of its own and not leaving our solar system. At this point, traditions resources sounds more realistic than buying and selling with money.
For those that have achieved space travel, having a far advanced telescope millions of times stronger than our Hubble telescope is likely. They probably mapped out plausible planets and set off to visit them like we travel on an airplane for a few hours
I like the fishing analogy about trying to catch fish by scooping a small bucket into giant ocean. It's interesting because it doesn't only point to problem of volume studied vs entire volume but also issue of technique - any fisherman will be able to tell you that you could be surrounded by fish and still not catch one with a bucket. There are very specific tools say a rod and reel and boat even with those it still takes practice, expertise, putting your time in, knowing the right spots, etc to get a good one
And time. What if those fish were spawning in that ocean thousands of years before we decided to go fish there... or thousands of years after. Separation, not only by the vastness of space but by eons and eons of time greatly reduces the likelihood of a potential meeting between species of different worlds.
Thanks, I was riveted to the screen for fifty minutes, I'd forgotten how much I used to love the Christmas Lectures. Worthy of my subscription. A Carl Sagan quote that has always stuck with me "humans may be the best beef animals in the universe" from his Cosmos series.
I love Arthur C. Clarke's take on this subject: Either we are the only intelligent life form in the universe or we're not. Either thought is terrifying.
Yes, many people are terrified at the mere thought of alien civilizations. This is why the world's various governments have been lying to us about UFOS/"UAPS" like...forever.
@@alkh3myst Yes, its part of the age old story, ignorance fosters fear. Conversely, learning and knowledge gives confidence and kills unwarranted fear. There is no evidence of aliens, none. Any person with a small amount of scientific factual knowledge can understand why. 1. The Universe is vast beyond the comprehension of most humans, these are the scared ones. 2. If aliens exist, they are too far away to concern us in any way. 3. Our nearest other star system with a planet is 24.5 trillion miles away, it would take us about 80 thousand years to go there. (let that sink in) 4. Physical law is universal. Aliens are as constrained by these laws as we are. 5. We have a limited life span of around 100 years. Why would anyone of us care about or fear aliens who would much take longer than a human lifetime to to reach us? 6. Forget about all the 'pie in the sky' propulsion systems you may have heard of. They won't happen. We can't travel through space faster than the speed of light. End of facts.
The problem of finding extraterrestrial civilizations is something like this: Let's say there was a single human village in Europe and another in Australia, but none other anywhere else. They both have a small fleet of ships and can travel a few days away before they must return to port and resupply. How long would both villages go believing they were alone in the world? Maybe first contact would come when their respective civilizations and technologies had spread so far that it was inevitable there be an encounter. Maybe that's how it will ultimately happen in space as well.
thats way too small of an example...as inevitably they WILL meet each other if they continued to develop in a similar time frame on the same planet. If for a brief instance another life form somewhere in a "close" solar system happened to develop at exactly the same time we did AND they managed to broadcast a signal which we could recognise, say they were in an area of space that was close by the time of which it would take to reach earth the civilization that sent it could be thousands upon thousands of years gone by. Think of what we have achieved in the last 200 years......now 5000....say 50000 ? What sort of advances would a civilization have IF they lived another 50000 years? IF we are around that long (and not been wiped out by a meteor or solar flare or the planet finally giving up for what we are doing to it....) we may be so advanced that we might not even notice it Also as a race we may be so far removed from what we are now, our current ideologies and perceptions of the universe may be so different to them as to have no common ground, i.e., they would either share knowledge or wipe us out, or we do the same to them.
Any Aliens contacting us first would have to have been far more advanced than ours, to develop necessary spacecraft and spend time getting here. We will never se any.
The vastness of the universe is unimaginable.If we would all consider that even with our telescopes in space we are only viewing such a small part of the universe at a time if you were to think of the ocean as the universe.Our observations would place us in the basement of the beach house
@@ToniLixSim I never said he was right or that I believe what he says. Just saying how well he connected with the audience, but well, you REALLY wanted to call me idiot, that says a lot about you buddy
@@laniakea1541 u say this guy is brilliant. brilliant liar or? if u understand he was lying that mean u learn and change ur mind, same as people who listen to politic and tv media and read news paper are idiots too,, until they learn they are losing time with fake things
@@laniakea1541 i play games after i have explored and learn too too many things, i did not sleep more than 3 hour for a many years, all that was because i like to learn things, i know not sleep is bad but dont want to stop learning, that was not stay away to play games as u wrote and deleted. and i do not live on my family house it is my house, im sorry for that u did not like it my comment but i like to say the truth without care how u will take it, better talk bad to me and u learn something than if i talk nice to u and u still not understand the truth.
He summarised everything we known so far and what we do about aliens, excellently put together, brilliant lecture! He should have his own youtube channel or podcasts of some sort
No he was completely wrong. Anyone even remotely aware knows that UFOs are real. Obama and Nasa administrator both effectively admitted that ET ships frequent our skies in late 2021. A bare minimum of thinking is allowed. You can start with the 2004 USS nimitz case. Its a solid starting point by which you can be certain.
@@DarthVader20201 Why not? all that I'm aware of are oxygen breathing. The grey race in the travis walton case has a dense moist low oxygen atmosphere where travis walton had trouble catching his breath, I'm guessing around 3% oxygen content and maybe double pressure so a relative oxygen pressure around 6-7% but he could function in it. In our atmosphere they might feel the oxygen is very rich, not sure if that would cause problems for them but I'm guessing not at least short term. We can breathe pure oxygen.
@@DarthVader20201 We don't survive too long under water or in space, but we have constructed suits to assist our existence in such environments, same for going onto mars we will need suits, Id guess any alien civilisation that has constructed vessels for space travel, have also achieved creating environmental constructs to assist in living in environments different to that they evolved in naturally. Talking about suits, Darth you should be well aware of self contained suits to assist living.
That was a wonderful talk and the speaker's passion for SETI was quite evident! Thanks Ri for uploading it. This is why you're my all-time favorite channel on TH-cam!
@@TheRoyalInstitution Yeah, thanks for the disinformation. Our govt works with aliens. Our skies are filthy with UFOs. Shills like you are trying to somehow convince those who have never seen them that they dont exist. You are a dying breed.
SETI was worth trying, but the poor results so far probably means it might be under threat of termination. If aliens exist, they are too far away and may not wish to communicate anyway. Even if close, say 50 light years. What would be the point of a two way 100 year contact lasting more than a human lifetime?
@@geoden One-way communication is reading books from long-dead people. A positive signal could be transformative and help us survive. Knowledge of their history, geology and biology (evolution) would double our knowledge of those fields. Receiving an Encyclopedia Galactica would advance us a thousand years.
A person can get lost on here on Earth and in spite of wanting and trying to be found, combined with rescue squads in full force out looking for them, yet we often still can't find them. Even full sized planes with tracking devices have accomplished this. Now expand that to the universe and think about it again. We just don't understand the scale.
Yeah, we also need to realise that the classic sci-fi of galaxies teaming with intelligent life is just fantasy, life is definitely not that common, let alone intelligient life, if it was it would be impossible for us to not be aware of it already.
Not a perfect analogy, one can indeed 'hide' as an individual organism on or in a planet, but for astrobiological purposes, we zoom out beyond individual specimens and look for the tell-tale effects of extant life on things like atmospheric chemistry, looking for short-lasting or unexpected pollutants that could well represent the exhalations of life. For this sort of planetary study we can sometimes be lucky enough to be able to probe that distant world's atmosphere via specialised telescopes fitted with spectrograph. It's an exciting time to be alive when we may one day discover a relatively nearby exoplanet whose atmosphere is suspiciously 'out of equilibrium' in a way that simple geology and chemistry cannot easily explain.
We might be the only life in the universe and could disappear in an instant. So any life that was there for a moment in time in the universe could also disappear. What we might not realise is that life is just something than happens every so often for a brief a time in the universe. The universe apparently has rules, by all the science that says, if anything was different the universe wouldn't exist, and so does life have rules, but much more delicate rules. The universe's rules dominate over the rules of life, as we absolutely know it can wipe us out in a second, and still itself continue as normal. We might be a delicate flower growing in a desert, saving ourselves should be our aim. Nature is not on our side.
@Edward Hinton this is only true given the supposition that the universe and it's "creator" value life above all else. Im not sure the observable data supports this assertion.
@@danielreece3996 nah, He values life. Just not Evil Life. All humans are *exactly the same* What we personally identify as Evil, we hate. Some Life is Evil...please...dont ever make someone have to remind you of this again. *Life Contains Both Good And Evil*
@@cwc6632 I agree the data set is in all likelihood such a tiny fraction it is almost nothing, but isn't that the whole aim of the scientific method to be constantly redefining your conclusion based on new incoming data, not starting with a conclusion and trying to work backwards to make your data support it?
@@Macheako the only thing you have "reminded me of" is that to clinging to antiquated fables from the bronze age and attribute supernatural causes to events just because the science of the matter is not yet understood is the reason mankind is not further along in our understanding of the universe.
Nicely presented. 3 possible areas of response to the title query: they don’t exist; they don’t want to be contacted; we don’t have the capability. Either of the first two options obviates the third. The Drake equation applies but does not prevail
or aliens are not as advanced as us so lack the means to even perceive us much less respond to us. Unless aliens are going to be travelling inter dimensionally or via a wormhole the distances are just insurmountable
It's a bit like saying, why didn't scientists in the 1700s see dust-mites? It's all about equipment. I mean up until a few years ago, we didn't even know if exo planets existed As telescopes improve, we're probably going to find alien life. Whether they tell us, is a different matter.
Agreed but, there's also the matter of expectation. Science seems to expect that everyone "speaks" our language. Not only the wrong equipment, wrong language. Presumptuous.
There are a lot of factors why we cannot contact aliens. Number 1: there might be none. Number 2: They are simply too far away. Number 3: Their communication is simply way too different than ours. Number 4: We are ants to them. We might not see them even if they stand in front of us. Number 5: We are giants to them. They might be just too small to for us to see. Number 6. Alien form could be anywhere from liquid to energy or something else all together. Number 7: I think you see where i'm going with this.
Ha ha your numbers 1 to 6 are a perfect flow chart of real reason's. Two through six are good debate topics. But as of 2023 the only true reply is your Number 1. We are it.
No 1 - unlikely cos the math is against that. No 2 - very probably and if we do hear from them, they've long gone; same as if they hear from us. Most 3 - 6: no, maths and physics are the same throughout the universe.
@@billybutlin7857Number 8 : In roughly 13 billion years, the chances of us and another hypothetical civilization near enough to detect existing as a technological civilization at the same time is almost nil.
I felt his nervousness but I hope he reads these comments that let him know he did a great job. Next time get some friends to come along and laugh at your great jokes!
In the late 60's, I witnessed a classic ''Flying saucer" fly low and slow directly over my house less than 100' directly above me.....never made a whisper...and was as big as my house. Although it was about 10 pm and dark, my unshielded front porch light lit it up quite well. On its bottom was a tight triangle of brilliant red lights. It wasn't until the next day, as I was telling coworkers about it, I suddenly realized that although that craft was very low, it never made a whisper. Now, here it is over 50 years later and cannot seem to shake that image from my mind. I had been working in my unheated shop and was intent on getting a hot cup of coffee, but how I wish I had given it the attention it warranted. Instead of spending time concerning ourselves about finding aliens, we should be concerned about the fact they have long ago already found us. BHE
Amazing story! I believe you! So many people even in our lifetime have experienced similar events, yet we have no concrete proof of their existence. I'm hoping that we can get that proof soon.
Your evidence, while fascinating, needs to be of the form that scientists can build theory and understanding from. Only with such evidence can we begin to learn.
Hi, Kevin! I was listening on headphones, and there's quite a bit of response in the audience, but there are three things to consider: The first is that Keith is wearing a voice microphone specifically designed not to pick up extraneous noises. It's a lecture, so there's no ambient chuckling being recorded for an audio engineer to mix into the main feed. And besides, adding 'canned laughter' from a so-called live studio audience is a crime punishable by death and a fine of £2.35. The second point is that this is happening at a famous venue. People in such a 'hallowed' hall will be nervous; parents will have told their children not to fidget and to be on their best behaviour.🤐 It's not a stand-up comedy club or a political rally; only barbarians would stamp and whoop in a library or cathedral. 🤫 The third and perhaps most important thing to consider is that this is in England. Unless it's attending a winter pantomime (which is very loud, rude, crude, chaotic, with lots of shrieking kids and audience participation), a typical British theatre audience sits and listens in silence. Good manners, what? 🧐 Interrupting a lecture, music recital or intense theatrical production with noticeable outbursts of laughter or applause is extremely bad form. It breaks the spell. One nods and smiles, or purses one's lips and frowns whilst appreciating the performance.🤔 In a situation like this, a lecture, one listens and does not join in. The applause (if any!) comes at the end. An American audience (for instance) might see this as being terribly cold and discouraging, but that's why we made sure that there's a lovely great big ocean separating our two nations... 😁
@Elli P Your comments were great, no… ‘spot on!’ Right up and until the America bashing. I have some sad news for you cheeky girl. It wasn’t England that put the pond between the two countries, but then I’m a polite monkey.
A really interesting and compelling lecture by Keith. As a child I watched Carl Sagan's Christmas lecture which Keith alludes to. He was a fantastic speaker and it made a big impression on me.
I know why. Imagine 2 ants, one that represent us and is on the beach in Florida and 1 that represent an alien civilization that is on the beach in Australia. What are the chances that they find each other? Well, with the size of the universe which is infinite, the odds of meeting aliens are worst then my ants example.
That's a bit crooked comparison. Ants do not have any means of long distance communication, so there's nothing to detect. But I agree with your argument. The distances in the universe combined with relative short use of radio waves by a civilization makes it almost impossible to detect others.
@@Curt_Randall Ok, lets put an ant on the moon, 2 on Mars, 1 on venus, a couple on some of Jupiter's moon and Saturn's moon. There, up to say 10 on a section representing say 0,000000000001% of the current universe, are their chances of meeting any better? of course not. Copy this tiny part of the universe a billion times or 0,1% of the universe, you now have 10 billion plus civilizations with the same odds of finding each other as our original 2 ants. Are the chances of them meeting any better? Well the answer is no and you now have 10 billion civs... Now there is always the possibility that 2 civ spawn so close to each other that they meet but it is still improbable.
I saw Carl Sagan at the R.I. The thing I remembered most was his comparison of how expensive an aircraft carrier was compared to how much we spend on this kind of research.
From all we know so far it’s more likely that there is other life in the universe than there isn’t. At the same time it sounds totally unlikely to me that we will ever be able to make contact due to distances and the relatively short time from when civilizations are advanced enough to detect each other until the time they vanish. Even if we could find the right planet, ‘they’ could be extinct for millions of years or life might develop in millions of years when there is probably no intelligent life on earth any longer. SETI is a good idea and a nice effort but without major funding it sounds like it’s not even a drop in the bucket. It’s probably more likely that someone will find us. Maybe they already have, and we were so boring for them (bc we are in the Stone Ages compared to their technology ) that they only put us in their catalog and moved on to find something really interesting.
Its funny how stuck on radio we are, when quantum physics shows us nonlocality is fundamental to physics, and nonlocal communication may explain all the strange messages encoded in religious literature for millenia. The movie Contact may be closer to the truth than the book Contact.
I think it's actually not that complicated, there is no paradox if you're much more conservative with the Drake equation than he himself was. Let's say that the actual number of intelligent species living at the same time, per galaxy is maybe only one or two, and that the chances of them both being technologically advanced enough at the same time to at least have radio technology is so remote it's basically zero, then that would explain why no one appears to be out there. Also let's remember that we're in about the third generation of stars, it's reasonable to assume that no life could have existed during the majority of the first generation's lifespans, because the creation of the elements needed to create planets and life was far rarer, since that needs stars to go nova to spread it about, and only as time passes will that material begin to become more common. Then also remember it took about 4 billion years give or take from the formation of this planet to it producing intelligent life that could build radios for example, so it seems reasonable that it would take another planet somewhere else roughly the same time to do it there. That's about 1/3rd of the age of the universe to produce us. So considering that, it's IMO actually quite natural that life appears to be very rare, and especially intelligent life, we could infact be among the first species to evolve given the time it appears to take for a planet to produce it, and that is why there are not many others about yet.
Judging from the one example we have, I agree that intelligent life is probably very rare. But single celled organisms occured almost instantly (in geological terms) after earth had been formed. So, simple life could actually be quite common and maybe we are going to find evidence for extra-terrestrial life even within our own solar system.
And even though as you said , life is still pretty rare at this point out there in the universe, it somehow has already found us , or has been with us for eons from all the imperial evidence that is available to us to look into this theory. The bottom line is this: The extraterrestrials are already here. We should start researching who they are, where they come from, and what are they doing here? These are the questions SETI should be concentrating on if they are truly all about seeking extraterrestrial life. Go watch the TH-cam documentary called *_The Nimitz encounter_* All the details are there for your determination. Have a great weekend, and GO NINERS!!! P
Simple logic put well, yet so many refuse to accept it. I tend to direct people who are willing to hear other views to Isaac Arthur's channel for his Fermi paradox series. Everything enyone can need is on there. We are almost certainly alone.
If the laws of physics apply to the entire universe and not just our Earth, then I think life on other planets could be the same as ours. If no "happy accidents" cause the lifeforms to evolve from single-cell to multi-cell organisms, extraterrestrial life may look like an early version of our planet. Maybe there are dinosaurs on other planets. If a meteor never crashed into their planet, the dinosaurs would continue living to this very day.
The star and solar system or energy system of the planet with the available elements could make a ton of different combinations to harbor different types of life.
I think its so strange how earth is the only planet in our galaxy that has life. wonder why all the other planets are even here for. there isn't even a local star everything we see in our sky is exactly the same as what the Romans and early civilizations gazed upon and are light years away. it really seems like something or someone dilliberatley put us here and made sure we were isolated.i honestly think were not ever gonna know the truth because its obviously been blocked, erased and vague. I dont think we were even designed to comprehend our existence and origin.
You have all the power of the largest stars imaginable and by the time their signals reach us, they are tiny twinkles of light in the sky. If we wanted to send a signal to the nearest star and tried to receive it there with our most powerful receivers, we couldn't detect ourselves. My personal opinion is that life is probably extremely rare and intelligent life is pretty rare given that there has been exactly one intelligent species out of the hundreds of millions of species on earth. Secondly, the distances are so extraordinarily large that I just don't accept that anything out there can traverse such distances. So even if there is intelligent life out there, I doubt there is anyway to detect, communicate with, reach them, or even find out that they exist, so for our purposes, they don't
Whenever I read such sound attempt to pontificate about the only way I can temper my response is to stick with the shocking facts, which you "just don't accept" -- therefore, this reply is for other readers passing through. On the evening of 15 August 1977 this individual, being born and raised a Christian, stood praying to the lord, and when I said "I love you" a star shot into the cup of the Big Dipper, right in front of my eyes. It was like lightning that you could have seen from anywhere in the northern hemisphere, anywhere that could see the Big Dipper. Indeed, in Ohio, at the SETI project, the radio-telescope "Big Ear" was running and listening and recorded the narrow band frequency burst, and they dubbed it the Wow Signal. If my testament before you is true, then either God exists and has an ear for even somebody like me, a complete unknown. Or, as the SETI crowd suggests, the signal originated from the constellation Sagittarius. What I can say to that is, drawing a navigation line from Weatherford Oklahoma across the Stelvision sky chart, when set to local time 9:15 pm and date of 15 August 1977, your sight line from OK to Sagittarius cuts right through the cup of the Big Dipper. This means that SETI corroborates my testimony. So what do you suppose SETI said when I contacted them? Seth Shostak, Director, said "It was probably some kind of interference." Now assume I was destined to witness that biblical event, and nobody else. We now have the situation Christ referred to as the sign of Jonah, which is simply that a wicked generation seeks a sign from God, but all they will get is a guy like me with a story like this. You always have to choose to believe it or not. None but the stubbornly ignorant will claim I just happened to be lucky or unlucky, like getting struck by lightning, just happened to have been standing there holding out my arms, looking in just the right direction which was up at the North Star, Cassiopeia, and the Big Dipper above the black flat Oklahoma horizon, and uttering at just the right moment a prayer (about becoming an actor, by the way since I was studying Drama), that ended with the words "I love you" at the precise instant the "Wow" signal arrived, all these countless light years after it had been sent by whomever, so that the one signal heard around the world and celebrated by the astronomy community, would actually be seen by just one silly guy, this simple individual who happened to be watching the heavens and praying to Jesus Christ like any other Christian but by the grace of God, at just the right time frame, between 9:00 pm to 9:30 pm on that one particular day? It is absurd. The bottom line is, saying some light seen somehow is so far away and thus such a long distant trip, must be naive. The smart thing to believe, is that we are not alone but we must earn the right of passage before the Webb telescope informs us of inhabited worlds. If we don't believe a moral force is opening the door, then we will not get the door to open. I am living proof, believe me or not, that the door is a living thing. SETI calls it the Wow Signal. I call it Jesus Christ.
"If we wanted to send a signal to the nearest star and tried to receive it there with our most powerful receivers, we couldn't detect ourselves." I really doubt that. We can still pick up transmissions from Voyager. Carl Sagan said Arecibo could pick up a signal from a similar dish 15,000 light-years away. Even if that estimate gets reduced by a factor of 15, due to possible signal degradation, I can't see it being ineffective below 100 or 1000 light-years. "There has been exactly one intelligent species out of the hundreds of millions of species on earth." There are highly intelligent mammals, birds, and cephalopods. But if you mean technological civilizations, then I can name two: Denisovians and Neanderthals both used Stone Age technology. If we had died out instead of them, one or both of them may be involved in building radio telescopes now or in the future. "I doubt there is anyway to detect... them." This video talks about SETI (Search for Extra-Terrestrial Intelligence) by looking with radio telescopes for radio signals and LaserSETI cameras for laser signals sent to us.
1. The must be sending signals 2. They must be pointing their signal towards the Earth 3. The have to do so continuously - before I continue - Are Earthlings doing this right now? are we sending signals everywhere all the time? Nope - ok so why do we think they are doing it? (if they exist that is)
Finally found a video on this subject that mostly agrees with me. The Drake Equation is a thought-experiment. We have insufficient data for many terms. We need the telescopes to give us a survey of Earth-sized exoplanets out to 500 or 1000-light year radius. Once we get a number of oxygen-atmosphere planets then we can multiply by 100 or 50 respectively for distance, or by fraction of stars to get a number for the galaxy. Meanwhile if we can seriously listen/look for radio or laser emissions from more stars we might find evidence of alien civilization, which could help us unify and survive, even if they don't give us their history or tech.
@SittingMoose Shaman You need to say what you mean then with regard to my OP which said: We can use astronomy to look for f-sub-l, the fraction that have life (as evidenced by oxygen atmospheres), and N directly, by finding just 1 radio/laser message we'd go from N≥1 to N≥2.
His conclusion = radio waves would be the best way to communicate long distance because they can travel through obstacles. Aliens = radio waves travel through obstacles, anyone can find us, let's not do that.
simplest reason -- the window for detection is miniscule. We make "noise" but it would barely be discernible past our own solar system. 200 years later, we will have the technology to not make any more noise as we switch to greener methods. A 200 year window, in which a alien would have to be looking directly at earth and intentionally searching for specific data (which we don't even know what we are looking for yet) is rather a long-shot by anyone's standard.
I don’t understand why some people assume intelligent life would evolve at a similar rate as us. Who knows? We could be the slowest ones to evolve in the universe.
Maybe alien life has a short life span..maybe alien life is not organic like us..maybe they are so far far away..our signals hv yet to reach them..maybe they are not intelligent enough to pick our signals..maybe aliens were present before humans existed..so many possibles..
it's a great question. humans took 4b years to evolve... or at a more fine grained scale, it took us 1m years to go from chimp to champ. parts of our evolution were very rapid... but why were we (apparently) the only ones in 4b years to evolve metal tools!?
That laser signal we send out will take 20,000 years to reach the centre of our galaxy. Any reply will take another 20,000 years to get back to us. If the human race still exists by that time, not all that likely if you look at current developments, one has to doubt that someone will know about something we did 40,000 years in the past.
The concept of a Dyson sphere was dreamt up by science fiction writers. Originally the late great scientist was talking about a different kind of astronomical phenomenon. He states this in an interview which is available on TH-cam :)
Hardly, They are called ball Castor Canister Vacuums. The ball was first used in joints and then as rollers and wheels. Dyson's sphere is an old engineering design for earlier adaptions of the ball in a joint or as a roller. The Dyson sphere is just another adaption of an earlier invention. The ball castor gives the vacuum a smooth even movement.
It is not possible to completely enclose a star, the gravitational forces will riip it to bits, we Humans already know this the math does not lie with this, this is before we mention the amount of mass / material needed to do it, is literally more than all of the planets in our entire solar system.......Yea that sounds doable, sure........No species will ever build one, ever its just absurd to an actual real world engineer........
The Fermi Paradox is not all that paradoxical when you consider the vastness of space and time that makes other lifeforms inevitable also provides plenty of room for our paths to never cross.
@@trudytrew6337 I doubt you could demonstrate there has been no scientific interest in UFOs. The fact that scientists do not engage in unproven speculation about aliens, and don't consider anecdotal evidence as proof that these supposed aliens are violating the cosmic speed limit is called doing their job. There is no more reason for scientists to take a position on anomalies in the sky being aliens than for them to announce claims of Jesus toast proves anything about religion. I have no doubt scientists have looked at the information, and found it interesting, but lacking in any facts that would meet the standards of the Scientific Method.
My favorite quote of all time, which will appear in my first book next year is a full sentence from the opening quote in a large “coffee table” style book on map-making by the “National Geographic Society”: MARS WAS THE FIRST PLANET TO BE MAPPED. We’ve got some catching up to do, mates!
If life's chance of formation is indeed a fluke of sufficiently long odds, then all the coin tosses in the Universe won't matter and we would be it's only success. Now, I don't happen to believe that's the case, but it's important for me to say that's a preference of mine rather than something I've evidence for.
One of my favorite presentations on the idea of other life in the universe and why we haven't made contact was Peter Mulvey's story about "Vlad the Astrophysicist."
Haven’t we probably been underestimating the size our galaxy? I was under the impression that its estimated size is now more like half a trillion stars.
Spanish Flu was worse with 6000 dead/day and people not wanting to write or think about it afterwards. It's been awhile since I watched _The Andromeda Strain._ How bad was that? We could have a problem if there's a Mad Cow disease that takes out all adults 20 years after eating contaminated food, similar to AIDS. Then there could be an easily-transmitted Ebola virus pandemic. Fortunately, they worked on vaccines, so might save some people.
Who says we have not? Would they actually reveal themselves in a way we would understand? The entire Universe and all dimensions contain matter we have never understood.
Although I thoroughly enjoyed this lecture, I have to disagree with the speaker regarding how "suspiciously" finely-tuned our universe supposedly is for life. It is a fact that nearly all of the matter and information in our universe exists within black holes. Of everything that exists, the majority is dark energy which is ever expanding our cosmos to an eventual heat death. Of the fraction of existence that IS matter, most of it is dark matter, for which we have no expectation constitutes living organisms. Of the fraction of matter that is "ordinary" matter (from our biased perspective) that is NOT stuck in black holes, the vast majority of that is Hydrogen in stars. Of the miniscule fraction of ordinary matter that isn't just hydrogen plasma or stuck in black holes, the majority of that isn't part of living organisms or even planets. Of the portion of the ordinary stuff that has formed planets more or less habitable, most planets won't experience abiogenesis due to confounding factors like nearby supernovae, the absence of magnetic fields, or asteroid impacts. If we then evaluate Earth, life had been nearly extinguished multiple times and it barely squeaked by each extinction event to proliferate again. 99% of all life on Earth has gone extinct because Earth is pretty hostile to life. The universe is just barely compatible with our existence as it is overwhelmingly incompatible with life in general. We were merely lucky... OR potentially inevitable depending on your ego regarding the odds. Given the astronomical odds regarding events that had to take place for us to exist, life might be SO UNLIKELY that Earth life is the only example in our galaxy. That's why people argue on behalf of divine intervention due to ego. The truth is that we exist because somewhere in the vast cosmos all of the variables would almost inevitably be barely (but sufficiently) compatible with life arising. If the universe never produced a location with those prerequisites, no one life would exist at all. And that would be unsurprising given how hostile to life our universe certainly is. Life arising is a FLUKE given the rest of existence is bent on being hostile towards it. There isn't anything suspicious about that. It's merely playing the odds by rolling the dice trillions upon trillions of times. Given enough rolls, you will get a run of 10000 double-six just by chance. That is equivalent to how we got here. Given the vastness of the cosmos, at some place therein all of the conditions would be met for life to start and the sequence would have occurred correctly. It is entirely possible that the sequence of events for abiogenesis are so restrictive and contingent upon an environment that is so specific, that life might be a one-off, leaving Earth life the only example of life in the universe. We may also just be the first intelligent life to have arisen due to the odds against that happening. But I do agree that we should still look for it nonetheless.
Sir Gregory Dearth, thank you for expressing those thoughts and shaping my understanding of how precious Life on Earth is. Surely, you must be a world-class physicist.
If you understand Radio waves, there is no known radio frequency that doesn't exist in the background radiation. When we use radio waves, we are boosting a signal above the background noise to a useable level. This is a very local phenomenon. Radio waves fade into the noise quite rapidly. To increase the detectable range of a signal, you either have to focus the signal or increase it's power. Focusing the signal simply means increasing it's power in a particular direction while decreasing it's power in another. What direction do you choose to point your signal? As far as increasing power goes, there is this thing next to us called the sun, it out powers anything we can generate. Radio waves in space from life forms compared to nature is like listening for a whisper in a hurricane. We do not have the ability to detect a signal we can read at the necessary distance. Unless the aliens are sending morse code with a star....
@@1pcfred The point is that our method (radio signals) may not even be understood by other beings (and vice versa). Perhaps they use some other method that we have not yet discovered and do not understand.
@@asusean that's certainly a possibility. We don't even use radio like we used to anymore. Stations are still on the air but we've mostly shifted to more cabled data transmissions. I couldn't tell you the last time I listened to a radio broadcast or watched TV over the air. 20 or 30 years ago I did though. Like before I was online. I can remember a few years ago I was checking out a receiver's operation and I was scrolling through the AM band. I couldn't even find a station that was broadcasting in my language. It was rather eye opening. I guess media has to cater to the audience they can get?
I'm with Neal Degrass Tyson on this one. There are almost surely plenty of alien intelligent and even technological cultures out there but with how vast and spread out the universe is and that intelligent life rises and falls at different times, heck looks like we are about to enthusiastically extinct ourselves, it could be just a matter of time and space.
“Looks like we are about to enthusiastically extinct ourselves “ … I agree. We are going to overpopulate, over pollute, and deplete our natural resources. We can’t reproduce at the rate we are doing and not expect trouble with pollution and resources. And it seems no one wants to talk about it.
Neil De Grasse Tyson is no more qualified than your cat to make such a claim. There is zero evidence of aliens therefore they don’t exist until some evidence suggests otherwise.
@@greggstrasser5791 Do you know what the odds are of a life sustaining planet being self created in a space vacuum? You would have a MUCH HIGHER chance of winning the next 200 thousand lotteries in a row. That’s the odds we are dealing with. The size of the universe means nothing against those odds.
I fully believe that they have created impenetrable virtual realities in which they can live lives that allow them to be literally immortal, live in whatever way they choose, or imagine.
There are theories to suggest our reality is just that… so what we really are looking at is no more than our own code. We are never alone with our sense of wonder.
Anyone can fantasize any number of things, I thing there's infinite sentient alien unicorn civilizations that live in a different demension, furthermore they live in a Utopia powered by ice cream fusion. See anyone can say anything it doesn't make it true. this is the problem with the information age everyone knows just enough to spout unsubstantiated claims without any logical basis. Not long ago the same people were sure the sun revolved around the sun. Not long before that everyone believed the planets were gods. Not to be condescending but most people have zero business commenting on things they don't understand.
I like Carl Sagan's take on this question--from Cosmos, episode 12, "Encyclopedia Galactica": "If the nearest civilization is say, er, 200 light-years away, it would take them only 200 years to get from there to here at the speed of light. Even if they were travelling a 1000 times slower than that, beings from a nearby civilization could have come here during the tenure of human beings on the Earth. So why aren't they here? There's many possible answers: - One is that maybe we're the first; some technical civilization has to be first to emerge in the history of the galaxy. - Or maybe all technical civilizations promptly destroy themselves--that seems to me very unlikely. - Or maybe there's some problem with interstellar spaceflight that we've been too dumb to figure out. - Or maybe...they are here but, er, in hiding because of some ethic of non-interference with emerging civilizations; we might imagine them curious and dispassionate, watching us to determine whether this year again we managed to avoid self-destruction... - But there's another explanation which is consistant with everything else we know, and that's that it's a big cosmos. If a great many years ago an advanced interstellar spacefaring civilization emerged 200 light-years away, why would they come here? They would have no reason to think there was something special about the Earth, there are no signs of human technology--not even our radio transmissions which, er, have had time to *go* 200 light-years. From their point of view, all nearby planetary systems might seem equally attractive for exploration."
I love Carl Sagan dearly, but in this case, I strongly disagree with him. Any civilization able to come here, wouldn't be too interested in us, but in life in general and there's been a strong signal of life coming from this planet for billions of years. «- Or maybe all technical civilizations promptly destroy themselves--that seems to me very unlikely.» I would argue that any cilization capable of discovering science, must've been sufficiently curious to invent religion first. Since invented religions cannot ever be true, they must cause conflict. Science * Conflict = Extinction.
Interesting thoughts there. Sagan was a very wise man. I suppose another possibility is that while there was a civilization that could find us only 200 light years away, their planet had some sort of problem and the civilization collapsed, sending them back to square one. I guess the dark forest theory is just wild speculation.
I haven't heard that segment of _Cosmos_ in awhile, but I imagined his voice while reading the OP. I like to think that if aliens can form a sustainable technological civilization, they might have the ethic that life supports life in the vast emptiness of the cosmos. Just because they see a planet with an oxygen atmosphere 200 light years away, doesn't mean they put their all into sending a colony ship there to take it away from the indigenous inhabitants.
@@sandal_thong8631 Interestingly, if aliens on other planets 200 light years away were aggressive "the universe is ours to take", the chances of them making it here would still be incredibly slim. I can't imagine how difficult it would be for them to get a fraction of lightspeed acceleration let alone chancing a more than 200 -- maybe even 500 year voyage through space.
@@Briguy1027 More likely 1000-2000 years if they travel 1/10th - 1/4th the speed of light. Someone said a civilization that was too expansionist would likely turn on themselves since it may be easier to take over a world already colonized by their people than to transform dead worlds in a new solar system.
The Aliens don't use short wave radio, or any kind of radio, instead they use quantum based communication, which is faster than the speed of light, and cannot be tapped.
It's quite possible that microbial life exists elsewhere in the universe. There is a HUGE leap from this to intelligent life, which is exceedingly rare. Too many possibilities for extinction ranging from massive solar ejections, to asteroid collisions to orbital anomalies and so on. Also, anything suggesting life or the possibility of life on another planet requires the realization that that evidence is perhaps hundreds or thousands of light years old, perhaps even much older. It may not be there now,
Hmm? David....if you are uneducated...how can you judge what is an excellent presentation? Perhaps “engage brain before opening mouth!” Could be a start of something, educating yourself? Cos’.....if you are uneducated how did you “learn to read and write your comments?” Rethink your status on The Education paradigms .... and discover you Are educated! Regards!
Because how much we have searched is equal to you going to the beach with a glass, filling it with water and then looking at it going "Hmm, I guess fish don't exist because my glass doesn't have any" while standing in front of the massive ocean. The search has just begun.
@@xisotopex No it doesn't. We are unable to even confirm if a ninth planet exists in our own solar system, we most definitely aren't able to tell if something is out there (definitely is) without it coming to us or us coming to it. You don't understand how big the Universe is. We see millions of years into the past when we look at the stars. There is also no statistical probability as we have not found any life for comparison so it's impossible to measure. According to researchers we have searched one glass's amount of water from the ocean that is the Universe. In the next 50 years we will search one pool's worth. Saying that we are alone because you fail to even begin to comprehend the size of the Universe is just pure arrogance and stupidity.
@@xisotopex Im surprised there are still people like you around. Alien life and UFOs are yesterdays news. Our govt works with aliens. We have bases on Mars and the moon and god knows where else, thanks to the aliens. The aliens dont trust us and wont give us everything because they know we will use it for evil. My good friend didnt believe in UFOs until he saw a fleet of about 100 of them. Someone got video of them. TH-cam' Murrieta fleet of UFOs "for the video. Ive seen UFOs twice.
Its gonna be an exciting day the first contact or proof of alien life in other places in the universe. Its just fascinating stuff. Hope to be alive to see that day.
Fascinating. Every time I look up at the sun, I think of how long and difficult the road has been to get to this point in time. Let us not throw it all away because of our ignorance.
@@paulm5443 You are correct in a sense. All will be lost and depending on your age it will go down in your lifetime. Earth and humanity have the same expiration date. Probably less than 8 years from now. Some will be saved but only a few and only those that choose not to be saved will be lost. I think I know which group you're in
Scoop up the glass of water from the ocean and yet there are no fish. That is how much we've looked at. ETs could be everywhere and we wouldn't know it because we've barely looked
Minus religion I personally find it implausible and naïve that there isn't a higher being. The utter complexity of the universe is impossible without the existence of something else.
Interesting stuff. I'm pleased he mentioned "Contact" one of my all time favourite films, as it always reminds me of how insignificant we are in the Grand Scheme (if there is one) that we are. I'm in no doubt that there is life on other planets, but there may be 100s of 1000s of planets where life hasn't evolved into a species that could ponder the existence of life on *other* planets! 😉
@@sandal_thong8631 If that's true: fair point, however, for how many people would the significance of the difference actually mean to them to an extent that is meaningful. Those numbers are so massive that they actually lose meaning for those not having anything in their experience that would give those numbers meaning. Typically, such experience tends to come from work within the sciences.
Glad the speaker brought up dolphins. That we are starting slowly to figure out that we are not the only intelligent species on this planet, that there appear to be a number of kinds of intelligent life is a really important point. We haven't found this before right under our nose because we have presumed that intelligence always looks like us or at least uses that intelligence the way we do.
The 2022 Nobel prize was won by three physicists proving that quantum effects are instant. So perhaps it’s possible to send quantum messages quicker than instantly meaning that using quantum entanglement it may be possible to send messages instantly, this would have the advantage/disadvantage of the transmitter not only knowing the answer before he transmitted the question but the receiver knowing the question before he’s received the question.
The Fermi paradox, is the best argument for our reality to be a simulation , simply because the sheer number of galaxy and stars make it a certainty of Intelligent life in the universe .
Everyone knows that eventually all civilizations end up blowing themselves up with their particle accelerators....duh. Good thing we wont fall for that.
It has to do with the size of the universe. It’s so unimaginably huge, that there could be MILLIONS of other “planet Earths” out there yet it’s unlikely we’d be able to find any of them.
If of course you ignore the 2004 Nimitz and 2014/15 Theodore Roosvelt sightings which could not be explained by anything from this planet, I guess it is a good question.
We may not have found them but they apparently have found us. The answer to the alien-search dilemma is to look closer to home by equipping our planes and naval ships with ultra high resolution video cameras with a high number of frames per second.
Everybody always forgets about the last variable in the Drake equation. That's why we haven't found any. As he points out, we've only been sending signals for 100 years... out of 4.5 billion years the life of our star.
@@fredb2022 They've travelled 100 light years. While an intelligent civilization might not actually be able to know what they "mean", I would suspect if intercepted they would know they aren't naturally made, but instead from another intelligent civilization.
@@AnthonyWilliams-ew3wp Wrong! You arent counting the 14 billion years the alien signals could have been traveling towards us! Thats the proof that we are alone!
"Why is the Universe fine-tuned for life ?" It's not ; LIFE is fine-tuned to the Universe. That life only occurs in one small niche location (as far as we know) suggests the conditions for life are quite rare in the Universe.
Yeah, and they're listening to radio signals. I can't see an advanced alien civilization communicating using radio waves over vast interstellar distances due to how insanely inefficient it is. Why not use lasers, light or some other technology we haven't even conceived yet.
My lecture wasn't about the Fermi Paradox or great filters - the title of my talk was The Contact Paradox, which is named after my book, and the title is not referring to the Fermi paradox, although I do briefly talk about the Fermi paradox and the great filters in the book. But if the Royal Institution would like to invite me back to give a talk specifically about the Fermi Paradox, I'd be delighted to oblige!
@@zidbits1528 Just what do you think radio waves are? We could as you say beam them instead of radiating in all directions. But radio is light. Do you have something better? Tell us.
Star Ranger Why’d they throw it in the thumbnail lol. I think they’re incorrectly promoting this lecture. Still a fantastic lecture nonetheless. RI is just attracting an audience who are expecting something much less esoteric.
@@pokeman123451 I'm not sure why it says Fermi Paradox in the thumbnail, possibly a mistake or maybe because the RI thought Fermi Paradox was more recognisable as a SETI topic than Contact Paradox, and would get more people to click on it. Either way, I'm glad you enjoyed my lecture!
For me, I think many alien civilizations exist. I just think they might not be close to us, or they could be -- for all I know. We have barely begun to survey stars, so we can't say they don't exist.
We cannot say they don't exist, but we certainly cannot say they do exist....like some do. All we can say is we don't know and the average person hates uncertainty they really want to fill in the blanks even if it means lying to themselves. Pathetic
![ลองสุ่มไอโฟน 990 โกงมั้ย? [ โกงมั้ยครับ ep.101 ] | DOM](http://i.ytimg.com/vi/bfsWe0j492k/mqdefault.jpg)
A speaker who can expound at length, without notes; just a few slides to set the course for himself, and the audience. That alone makes this presentation a pleasure.
But the content of Keith Cooper's talk is well worth our attention.
The original question is easy to answer. Humans lie to much and are treacherous. E.T.s don't like this.
My favourite part of his lecture is around minute 32, when he talks about just how far (or how NOT far!) our radio signals have penetrated our galaxy. It's barely -anything-!
I was glued to this lecture for the entire 51 minutes. Thank you, Keith!
About 125 lightyears?
It certainly puts things in perspective.
It is a real gift to make a complex subject so easy to understand - loved it, thank you!
Has anyone ever factored into the equation the difficulties for aliens in getting funding to look for us?
actually it would go under the fraction of alien civilizations that send signals into space.
Or the motivation.
@maximumchron They're probably not capitalist either. It is unlikely their economics work the same way as our do. Ours are substantially different from a century ago, let alone a millennium. They may not even have a concept of money.
@@anonb4632 Maybe they are at the point where they branch out on their own. Kinda like "Amazon" building a spaceship of its own and not leaving our solar system. At this point, traditions resources sounds more realistic than buying and selling with money.
For those that have achieved space travel, having a far advanced telescope millions of times stronger than our Hubble telescope is likely. They probably mapped out plausible planets and set off to visit them like we travel on an airplane for a few hours
I like the fishing analogy about trying to catch fish by scooping a small bucket into giant ocean. It's interesting because it doesn't only point to problem of volume studied vs entire volume but also issue of technique - any fisherman will be able to tell you that you could be surrounded by fish and still not catch one with a bucket. There are very specific tools say a rod and reel and boat even with those it still takes practice, expertise, putting your time in, knowing the right spots, etc to get a good one
He got that Analogy from Neil DeGrasse Tyson. I have no idea where Neil got it from! But it's definitely a fantastic way to sum it up.
We know there are fish in the sea to be caught, because our experience and observation tells us there are. We cannot say the same for off planet life.
And time. What if those fish were spawning in that ocean thousands of years before we decided to go fish there... or thousands of years after. Separation, not only by the vastness of space but by eons and eons of time greatly reduces the likelihood of a potential meeting between species of different worlds.
Or a giant net
Or a big electrical bomb to incapacitate them
Thanks, I was riveted to the screen for fifty minutes, I'd forgotten how much I used to love the Christmas Lectures. Worthy of my subscription. A Carl Sagan quote that has always stuck with me "humans may be the best beef animals in the universe" from his Cosmos series.
Humans taste of pork
I love Arthur C. Clarke's take on this subject: Either we are the only intelligent life form in the universe or we're not. Either thought is terrifying.
Yes, many people are terrified at the mere thought of alien civilizations. This is why the world's various governments have been lying to us about UFOS/"UAPS" like...forever.
Doesn't terrify me, why should it? we're never going to encounter aliens.
@@alkh3myst Yes, its part of the age old story, ignorance fosters fear. Conversely, learning and knowledge gives confidence and kills unwarranted fear. There is no evidence of aliens, none. Any person with a small amount of scientific factual knowledge can understand why.
1. The Universe is vast beyond the comprehension of most humans, these are the scared ones.
2. If aliens exist, they are too far away to concern us in any way.
3. Our nearest other star system with a planet is 24.5 trillion miles away, it would take us about 80 thousand years to go there. (let that sink in)
4. Physical law is universal. Aliens are as
constrained by these laws as we are.
5. We have a limited life span of around 100 years. Why would anyone of us care about or fear aliens who would much take longer than a human lifetime to to reach us?
6. Forget about all the 'pie in the sky' propulsion systems you may have heard of. They won't happen. We can't travel through space faster than the speed of light. End of facts.
Either thought is only terrifying if you look through the lens of fear. Afraid to be alone or afraid of what aliens might do.
@@geoden Just in case you see one, just ignore it. They avoid associating with us humans anyway.
The problem of finding extraterrestrial civilizations is something like this:
Let's say there was a single human village in Europe and another in Australia, but none other anywhere else. They both have a small fleet of ships and can travel a few days away before they must return to port and resupply. How long would both villages go believing they were alone in the world?
Maybe first contact would come when their respective civilizations and technologies had spread so far that it was inevitable there be an encounter.
Maybe that's how it will ultimately happen in space as well.
thats way too small of an example...as inevitably they WILL meet each other if they continued to develop in a similar time frame on the same planet.
If for a brief instance another life form somewhere in a "close" solar system happened to develop at exactly the same time we did AND they managed to broadcast a signal which we could recognise,
say they were in an area of space that was close by the time of which it would take to reach earth the civilization that sent it could be thousands upon thousands of years gone by.
Think of what we have achieved in the last 200 years......now 5000....say 50000 ? What sort of advances would a civilization have IF they lived another 50000 years?
IF we are around that long (and not been wiped out by a meteor or solar flare or the planet finally giving up for what we are doing to it....) we may be so advanced that we might not even notice it
Also as a race we may be so far removed from what we are now, our current ideologies and perceptions of the universe may be so different to them as to have no common ground, i.e., they would either share knowledge or wipe us out, or we do the same to them.
Edit: I wrote this before listening to the whole thing.....i'm glad he went into alot of things I was thinking about.
Yes but Europe and Australia can't see each other.
Any Aliens contacting us first would have to have been far more advanced than ours, to develop necessary spacecraft and spend time getting here.
We will never se any.
@@biggusdickus5986 Never is a long time.
A lot can happen in never.
He's a great orator, his brilliants and his enthusiasm shine through.
The vastness of the universe is unimaginable.If we would all consider that even with our telescopes in space we are only viewing such a small part of the universe at a time if you were to think of the ocean as the universe.Our observations would place us in the basement of the beach house
P to the
If that beach house were a miniature and earth the size of pluto covered in oceans and then you're only talking about the observable universe.
@@dhl0706 amen brother
i just imagined the universe. twice.
@@thomasbisset4544
I can’t imagine you are willing to do that.
This guy (K. Cooper) is brilliant. What a talk! He connected so well with the audience. What a speaker!
he is not smart, u are idiot who believe on fake things,
so sad for u and many people like u :(
@@ToniLixSim I never said he was right or that I believe what he says. Just saying how well he connected with the audience, but well, you REALLY wanted to call me idiot, that says a lot about you buddy
@@laniakea1541 u say this guy is brilliant.
brilliant liar or?
if u understand he was lying that mean u learn and change ur mind, same as people who listen to politic and tv media and read news paper are idiots too,, until they learn they are losing time with fake things
@@laniakea1541 i play games after i have explored and learn too too many things, i did not sleep more than 3 hour for a many years, all that was because i like to learn things, i know not sleep is bad but dont want to stop learning, that was not stay away to play games as u wrote and deleted.
and i do not live on my family house it is my house, im sorry for that u did not like it my comment but i like to say the truth without care how u will take it, better talk bad to me and u learn something than if i talk nice to u and u still not understand the truth.
I hope he is not related to D.B. Cooper ??
He summarised everything we known so far and what we do about aliens, excellently put together, brilliant lecture! He should have his own youtube channel or podcasts of some sort
No he was completely wrong. Anyone even remotely aware knows that UFOs are real. Obama and Nasa administrator both effectively admitted that ET ships frequent our skies in late 2021. A bare minimum of thinking is allowed. You can start with the 2004 USS nimitz case. Its a solid starting point by which you can be certain.
Aliens won’t survive in our atmosphere, hypothetically speaking….
@@DarthVader20201 Why not? all that I'm aware of are oxygen breathing. The grey race in the travis walton case has a dense moist low oxygen atmosphere where travis walton had trouble catching his breath, I'm guessing around 3% oxygen content and maybe double pressure so a relative oxygen pressure around 6-7% but he could function in it. In our atmosphere they might feel the oxygen is very rich, not sure if that would cause problems for them but I'm guessing not at least short term. We can breathe pure oxygen.
@@DarthVader20201 We don't survive too long under water or in space, but we have constructed suits to assist our existence in such environments, same for going onto mars we will need suits, Id guess any alien civilisation that has constructed vessels for space travel, have also achieved creating environmental constructs to assist in living in environments different to that they evolved in naturally. Talking about suits, Darth you should be well aware of self contained suits to assist living.
@@DanFrederiksen some great points very well put Dan
That was a wonderful talk and the speaker's passion for SETI was quite evident! Thanks Ri for uploading it. This is why you're my all-time favorite channel on TH-cam!
Wow! Thanks so much for the kind words, we're glad you're enjoying it!
@@TheRoyalInstitution Yeah, thanks for the disinformation. Our govt works with aliens. Our skies are filthy with UFOs. Shills like you are trying to somehow convince those who have never seen them that they dont exist. You are a dying breed.
SETI was worth trying, but the poor results so far probably means it might be under threat of termination. If aliens exist, they are too far away and may not wish to communicate anyway. Even if close, say 50 light years. What would be the point of a two way 100 year contact lasting more than a human lifetime?
@@thomashess6211 take your meds
@@geoden One-way communication is reading books from long-dead people. A positive signal could be transformative and help us survive. Knowledge of their history, geology and biology (evolution) would double our knowledge of those fields. Receiving an Encyclopedia Galactica would advance us a thousand years.
A person can get lost on here on Earth and in spite of wanting and trying to be found, combined with rescue squads in full force out looking for them, yet we often still can't find them. Even full sized planes with tracking devices have accomplished this. Now expand that to the universe and think about it again. We just don't understand the scale.
Yeah, we also need to realise that the classic sci-fi of galaxies teaming with intelligent life is just fantasy, life is definitely not that common, let alone intelligient life, if it was it would be impossible for us to not be aware of it already.
Not a perfect analogy, one can indeed 'hide' as an individual organism on or in a planet, but for astrobiological purposes, we zoom out beyond individual specimens and look for the tell-tale effects of extant life on things like atmospheric chemistry, looking for short-lasting or unexpected pollutants that could well represent the exhalations of life. For this sort of planetary study we can sometimes be lucky enough to be able to probe that distant world's atmosphere via specialised telescopes fitted with spectrograph. It's an exciting time to be alive when we may one day discover a relatively nearby exoplanet whose atmosphere is suspiciously 'out of equilibrium' in a way that simple geology and chemistry cannot easily explain.
I am amazed at how so many lecturers know their topic so well they can just speak with no notes.
I loved this lecture! It randomly appeared in my feed. Thanks, R.I. This was a subject I never took seriously before. Very interesting.
I’m still trying to take it seriously. And if we think shining lasers into space to see who or what might say hello could be the last thing we do.
Randomly :)
Can't take it seriously at all.
We might be the only life in the universe and could disappear in an instant. So any life that was there for a moment in time in the universe could also disappear. What we might not realise is that life is just something than happens every so often for a brief a time in the universe. The universe apparently has rules, by all the science that says, if anything was different the universe wouldn't exist, and so does life have rules, but much more delicate rules. The universe's rules dominate over the rules of life, as we absolutely know it can wipe us out in a second, and still itself continue as normal. We might be a delicate flower growing in a desert, saving ourselves should be our aim. Nature is not on our side.
@Edward Hinton this is only true given the supposition that the universe and it's "creator" value life above all else. Im not sure the observable data supports this assertion.
@@danielreece3996 nah, He values life. Just not Evil Life.
All humans are *exactly the same* What we personally identify as Evil, we hate.
Some Life is Evil...please...dont ever make someone have to remind you of this again.
*Life Contains Both Good And Evil*
We are not alone
@@cwc6632 I agree the data set is in all likelihood such a tiny fraction it is almost nothing, but isn't that the whole aim of the scientific method to be constantly redefining your conclusion based on new incoming data, not starting with a conclusion and trying to work backwards to make your data support it?
@@Macheako the only thing you have "reminded me of" is that to clinging to antiquated fables from the bronze age and attribute supernatural causes to events just because the science of the matter is not yet understood is the reason mankind is not further along in our understanding of the universe.
Nicely presented. 3 possible areas of response to the title query: they don’t exist; they don’t want to be contacted; we don’t have the capability. Either of the first two options obviates the third. The Drake equation applies but does not prevail
or aliens are not as advanced as us so lack the means to even perceive us much less respond to us. Unless aliens are going to be travelling inter dimensionally or via a wormhole the distances are just insurmountable
Thank you to our host presenter. Nicely done. Really learned a lot. Here’s hoping.
Yep, a very good looking guy.
@@AHPSC meh
It's a bit like saying, why didn't scientists in the 1700s see dust-mites?
It's all about equipment.
I mean up until a few years ago, we didn't even know if exo planets existed
As telescopes improve, we're probably going to find alien life.
Whether they tell us, is a different matter.
Well said.
Evolving technology and intellect are what cause the advancement of our understanding of the physical world.
it's all about equipment. THAT'S WHAT YOUR WIFE SAID
Agreed but, there's also the matter of expectation. Science seems to expect that everyone "speaks" our language. Not only the wrong equipment, wrong language. Presumptuous.
A secret like that will come out quick. Informations that proves extraterrestrials is out there, is worth millions.
There are a lot of factors why we cannot contact aliens. Number 1: there might be none. Number 2: They are simply too far away. Number 3: Their communication is simply way too different than ours. Number 4: We are ants to them. We might not see them even if they stand in front of us. Number 5: We are giants to them. They might be just too small to for us to see. Number 6. Alien form could be anywhere from liquid to energy or something else all together. Number 7: I think you see where i'm going with this.
Good reply!
Ha ha your numbers 1 to 6 are a perfect flow chart of real reason's. Two through six are good debate topics.
But as of 2023 the only true reply is your Number 1.
We are it.
No 1 - unlikely cos the math is against that. No 2 - very probably and if we do hear from them, they've long gone; same as if they hear from us. Most 3 - 6: no, maths and physics are the same throughout the universe.
@@billybutlin7857Number 8 : In roughly 13 billion years, the chances of us and another hypothetical civilization near enough to detect existing as a technological civilization at the same time is almost nil.
I felt his nervousness but I hope he reads these comments that let him know he did a great job. Next time get some friends to come along and laugh at your great jokes!
I've had my computer on the Seti @ home project for about 20 years. Happy to be part of it!
funnily enough, the energy consumption of this program actually prevents us from ever reaching advanced civilization.
Found anything?
...and nobody has phoned home yet?
In the late 60's, I witnessed a classic ''Flying saucer" fly low and slow directly over my house less than 100' directly above me.....never made a whisper...and was as big as my house. Although it was about 10 pm and dark, my unshielded front porch light lit it up quite well. On its bottom was a tight triangle of brilliant red lights. It wasn't until the next day, as I was telling coworkers about it, I suddenly realized that although that craft was very low, it never made a whisper. Now, here it is over 50 years later and cannot seem to shake that image from my mind. I had been working in my unheated shop and was intent on getting a hot cup of coffee, but how I wish I had given it the attention it warranted.
Instead of spending time concerning ourselves about finding aliens, we should be concerned about the fact they have long ago already found us.
BHE
Amazing story! I believe you! So many people even in our lifetime have experienced similar events, yet we have no concrete proof of their existence. I'm hoping that we can get that proof soon.
Your evidence, while fascinating, needs to be of the form that scientists can build theory and understanding from. Only with such evidence can we begin to learn.
Brilliant lecture! What a lovely man! Audience somewhat devoid of humour though😀
Hi, Kevin! I was listening on headphones, and there's quite a bit of response in the audience, but there are three things to consider:
The first is that Keith is wearing a voice microphone specifically designed not to pick up extraneous noises. It's a lecture, so there's no ambient chuckling being recorded for an audio engineer to mix into the main feed. And besides, adding 'canned laughter' from a so-called live studio audience is a crime punishable by death and a fine of £2.35.
The second point is that this is happening at a famous venue. People in such a 'hallowed' hall will be nervous; parents will have told their children not to fidget and to be on their best behaviour.🤐 It's not a stand-up comedy club or a political rally; only barbarians would stamp and whoop in a library or cathedral. 🤫
The third and perhaps most important thing to consider is that this is in England. Unless it's attending a winter pantomime (which is very loud, rude, crude, chaotic, with lots of shrieking kids and audience participation), a typical British theatre audience sits and listens in silence. Good manners, what? 🧐
Interrupting a lecture, music recital or intense theatrical production with noticeable outbursts of laughter or applause is extremely bad form. It breaks the spell. One nods and smiles, or purses one's lips and frowns whilst appreciating the performance.🤔 In a situation like this, a lecture, one listens and does not join in.
The applause (if any!) comes at the end. An American audience (for instance) might see this as being terribly cold and discouraging, but that's why we made sure that there's a lovely great big ocean separating our two nations... 😁
I think they shoot u for any outbursts…
I was at this lecture and we were all pissing ourselves, oh god how we laughed.... I hope this makes you feel better
@@jeyDsixx18 sadly the truth
@Elli P Your comments were great, no… ‘spot on!’ Right up and until the America bashing. I have some sad news for you cheeky girl. It wasn’t England that put the pond between the two countries, but then I’m a polite monkey.
A really interesting and compelling lecture by Keith. As a child I watched Carl Sagan's Christmas lecture which Keith alludes to. He was a fantastic speaker and it made a big impression on me.
Sagan was an establishment hack. Look into the hatchet job he did on Velikovsky.
Sagan wasn’t a Scientist.
I know why. Imagine 2 ants, one that represent us and is on the beach in Florida and 1 that represent an alien civilization that is on the beach in Australia. What are the chances that they find each other? Well, with the size of the universe which is infinite, the odds of meeting aliens are worst then my ants example.
That's a bit crooked comparison. Ants do not have any means of long distance communication, so there's nothing to detect.
But I agree with your argument. The distances in the universe combined with relative short use of radio waves by a civilization makes it almost impossible to detect others.
@@TheBushdoctor68 It was an image to show how improbable it is to meet anyone else in this crazy vast ever expanding universe.
but with your analogy there are only 2 ants. In our vast infinite universe, I would like to believe there are more than 2 civilizations.
@@Curt_Randall Ok, lets put an ant on the moon, 2 on Mars, 1 on venus, a couple on some of Jupiter's moon and Saturn's moon. There, up to say 10 on a section representing say 0,000000000001% of the current universe, are their chances of meeting any better? of course not. Copy this tiny part of the universe a billion times or 0,1% of the universe, you now have 10 billion plus civilizations with the same odds of finding each other as our original 2 ants. Are the chances of them meeting any better? Well the answer is no and you now have 10 billion civs... Now there is always the possibility that 2 civ spawn so close to each other that they meet but it is still improbable.
yes but there is only one ant
I saw Carl Sagan at the R.I. The thing I remembered most was his comparison of how expensive an aircraft carrier was compared to how much we spend on this kind of research.
Wonderful talk. Thank you for this and wished the audiences laughed at his “jokes” 😅 he did a good job 👏
From all we know so far it’s more likely that there is other life in the universe than there isn’t. At the same time it sounds totally unlikely to me that we will ever be able to make contact due to distances and the relatively short time from when civilizations are advanced enough to detect each other until the time they vanish. Even if we could find the right planet, ‘they’ could be extinct for millions of years or life might develop in millions of years when there is probably no intelligent life on earth any longer. SETI is a good idea and a nice effort but without major funding it sounds like it’s not even a drop in the bucket.
It’s probably more likely that someone will find us. Maybe they already have, and we were so boring for them (bc we are in the Stone Ages compared to their technology ) that they only put us in their catalog and moved on to find something really interesting.
@Roger Felton we are better looking than who? 😂what are you comparing humans against?
@@GibboFrank stars are bigger than planets and emit light. Its easier to see stars . Exo planets whilst theorized were only confirmed in the 90s.
@@bettina4374 actually, we have no idea if life is more likely than not. We do not have the data set.
@Roger Felton that's a good point, they're likely beautiful animals.
Its funny how stuck on radio we are, when quantum physics shows us nonlocality is fundamental to physics, and nonlocal communication may explain all the strange messages encoded in religious literature for millenia. The movie Contact may be closer to the truth than the book Contact.
Interesting, entertaining and easy to understand lecture!
I think it's actually not that complicated, there is no paradox if you're much more conservative with the Drake equation than he himself was.
Let's say that the actual number of intelligent species living at the same time, per galaxy is maybe only one or two, and that the chances of them both being technologically advanced enough at the same time to at least have radio technology is so remote it's basically zero, then that would explain why no one appears to be out there.
Also let's remember that we're in about the third generation of stars, it's reasonable to assume that no life could have existed during the majority of the first generation's lifespans, because the creation of the elements needed to create planets and life was far rarer, since that needs stars to go nova to spread it about, and only as time passes will that material begin to become more common.
Then also remember it took about 4 billion years give or take from the formation of this planet to it producing intelligent life that could build radios for example, so it seems reasonable that it would take another planet somewhere else roughly the same time to do it there.
That's about 1/3rd of the age of the universe to produce us.
So considering that, it's IMO actually quite natural that life appears to be very rare, and especially intelligent life, we could infact be among the first species to evolve given the time it appears to take for a planet to produce it, and that is why there are not many others about yet.
Judging from the one example we have, I agree that intelligent life is probably very rare. But single celled organisms occured almost instantly (in geological terms) after earth had been formed. So, simple life could actually be quite common and maybe we are going to find evidence for extra-terrestrial life even within our own solar system.
And even though as you said , life is still pretty rare at this point out there in the universe, it somehow has already found us , or has been with us for eons from all the imperial evidence that is available to us to look into this theory.
The bottom line is this: The extraterrestrials are already here. We should start researching who they are, where they come from, and what are they doing here? These are the questions SETI should be concentrating on if they are truly all about seeking extraterrestrial life.
Go watch the TH-cam documentary called *_The Nimitz encounter_*
All the details are there for your determination.
Have a great weekend, and GO NINERS!!!
P
Ja is not a good 5 ki and it doesn't look like it is a good fit for John and
Mathias Tatzgern ø
Simple logic put well, yet so many refuse to accept it. I tend to direct people who are willing to hear other views to Isaac Arthur's channel for his Fermi paradox series. Everything enyone can need is on there. We are almost certainly alone.
Yup, that pretty much covers it. You have to respect this man, his lecture still holds up 2 years later.
If the laws of physics apply to the entire universe and not just our Earth, then I think life on other planets could be the same as ours. If no "happy accidents" cause the lifeforms to evolve from single-cell to multi-cell organisms, extraterrestrial life may look like an early version of our planet. Maybe there are dinosaurs on other planets. If a meteor never crashed into their planet, the dinosaurs would continue living to this very day.
The star and solar system or energy system of the planet with the available elements could make a ton of different combinations to harbor different types of life.
Maybe it's already destroyed itself
@@Dexerion like the ton of different life forms which have evolved on earth
You mean like a bilaterally symmetrical bipedal ape?
I think its so strange how earth is the only planet in our galaxy that has life. wonder why all the other planets are even here for. there isn't even a local star everything we see in our sky is exactly the same as what the Romans and early civilizations gazed upon and are light years away. it really seems like something or someone dilliberatley put us here and made sure we were isolated.i honestly think were not ever gonna know the truth because its obviously been blocked, erased and vague. I dont think we were even designed to comprehend our existence and origin.
You have all the power of the largest stars imaginable and by the time their signals reach us, they are tiny twinkles of light in the sky.
If we wanted to send a signal to the nearest star and tried to receive it there with our most powerful receivers, we couldn't detect ourselves.
My personal opinion is that life is probably extremely rare and intelligent life is pretty rare given that there has been exactly one intelligent species out of the hundreds of millions of species on earth.
Secondly, the distances are so extraordinarily large that I just don't accept that anything out there can traverse such distances.
So even if there is intelligent life out there, I doubt there is anyway to detect, communicate with, reach them, or even find out that they exist, so for our purposes, they don't
Whenever I read such sound attempt to pontificate about the only way I can temper my response is to stick with the shocking facts, which you "just don't accept" -- therefore, this reply is for other readers passing through.
On the evening of 15 August 1977 this individual, being born and raised a Christian, stood praying to the lord, and when I said "I love you" a star shot into the cup of the Big Dipper, right in front of my eyes. It was like lightning that you could have seen from anywhere in the northern hemisphere, anywhere that could see the Big Dipper. Indeed, in Ohio, at the SETI project, the radio-telescope "Big Ear" was running and listening and recorded the narrow band frequency burst, and they dubbed it the Wow Signal.
If my testament before you is true, then either God exists and has an ear for even somebody like me, a complete unknown. Or, as the SETI crowd suggests, the signal originated from the constellation Sagittarius. What I can say to that is, drawing a navigation line from Weatherford Oklahoma across the Stelvision sky chart, when set to local time 9:15 pm and date of 15 August 1977, your sight line from OK to Sagittarius cuts right through the cup of the Big Dipper. This means that SETI corroborates my testimony.
So what do you suppose SETI said when I contacted them? Seth Shostak, Director, said "It was probably some kind of interference."
Now assume I was destined to witness that biblical event, and nobody else. We now have the situation Christ referred to as the sign of Jonah, which is simply that a wicked generation seeks a sign from God, but all they will get is a guy like me with a story like this. You always have to choose to believe it or not.
None but the stubbornly ignorant will claim I just happened to be lucky or unlucky, like getting struck by lightning, just happened to have been standing there holding out my arms, looking in just the right direction which was up at the North Star, Cassiopeia, and the Big Dipper above the black flat Oklahoma horizon, and uttering at just the right moment a prayer (about becoming an actor, by the way since I was studying Drama), that ended with the words "I love you" at the precise instant the "Wow" signal arrived, all these countless light years after it had been sent by whomever, so that the one signal heard around the world and celebrated by the astronomy community, would actually be seen by just one silly guy, this simple individual who happened to be watching the heavens and praying to Jesus Christ like any other Christian but by the grace of God, at just the right time frame, between 9:00 pm to 9:30 pm on that one particular day? It is absurd.
The bottom line is, saying some light seen somehow is so far away and thus such a long distant trip, must be naive. The smart thing to believe, is that we are not alone but we must earn the right of passage before the Webb telescope informs us of inhabited worlds.
If we don't believe a moral force is opening the door, then we will not get the door to open. I am living proof, believe me or not, that the door is a living thing. SETI calls it the Wow Signal. I call it Jesus Christ.
A wise man acknowledges that the more you know the less you know. Every answer creates more questions. Extra dimensional travel? Cheers.
@@crapOnYT LOL
"If we wanted to send a signal to the nearest star and tried to receive it there with our most powerful receivers, we couldn't detect ourselves."
I really doubt that. We can still pick up transmissions from Voyager. Carl Sagan said Arecibo could pick up a signal from a similar dish 15,000 light-years away. Even if that estimate gets reduced by a factor of 15, due to possible signal degradation, I can't see it being ineffective below 100 or 1000 light-years.
"There has been exactly one intelligent species out of the hundreds of millions of species on earth."
There are highly intelligent mammals, birds, and cephalopods. But if you mean technological civilizations, then I can name two: Denisovians and Neanderthals both used Stone Age technology. If we had died out instead of them, one or both of them may be involved in building radio telescopes now or in the future.
"I doubt there is anyway to detect... them."
This video talks about SETI (Search for Extra-Terrestrial Intelligence) by looking with radio telescopes for radio signals and LaserSETI cameras for laser signals sent to us.
Totally agree buddy
1. The must be sending signals 2. They must be pointing their signal towards the Earth 3. The have to do so continuously - before I continue - Are Earthlings doing this right now? are we sending signals everywhere all the time? Nope - ok so why do we think they are doing it? (if they exist that is)
Rough crowd at the royal institution.
Nobody even chuckled at his jokes and kick lines. Lol.
Was thinking they were a bit of a tough crowd myself. Kinda felt sorry for him.
They smiled, I think. They were those kind of jokes. He is nervous and us star gazers are kind hearted folk !
Had he been famous they would have laughed at the lamest jokes; I watch a lot of these. Someone could probably write a paper on why people do that.
Enough real science, we want to get back to our gender studies class.
K Sonny lol fr
This is my favorite channel these days...
It said 'the great filter!'
I never clicked faster.
Good job, again, R.I!
Finally found a video on this subject that mostly agrees with me. The Drake Equation is a thought-experiment. We have insufficient data for many terms. We need the telescopes to give us a survey of Earth-sized exoplanets out to 500 or 1000-light year radius. Once we get a number of oxygen-atmosphere planets then we can multiply by 100 or 50 respectively for distance, or by fraction of stars to get a number for the galaxy. Meanwhile if we can seriously listen/look for radio or laser emissions from more stars we might find evidence of alien civilization, which could help us unify and survive, even if they don't give us their history or tech.
@SittingMoose Shaman I don't think sulfur-breathers will come evolve to live on land and build radio telescopes, especially without an ozone layer.
@SittingMoose Shaman You need to say what you mean then with regard to my OP which said:
We can use astronomy to look for f-sub-l, the fraction that have life (as evidenced by oxygen atmospheres), and
N directly, by finding just 1 radio/laser message we'd go from N≥1 to N≥2.
Best SETI lecture I’ve heard-excellent
Agreed
His conclusion = radio waves would be the best way to communicate long distance because they can travel through obstacles.
Aliens = radio waves travel through obstacles, anyone can find us, let's not do that.
simplest reason -- the window for detection is miniscule. We make "noise" but it would barely be discernible past our own solar system. 200 years later, we will have the technology to not make any more noise as we switch to greener methods. A 200 year window, in which a alien would have to be looking directly at earth and intentionally searching for specific data (which we don't even know what we are looking for yet) is rather a long-shot by anyone's standard.
I don’t understand why some people assume intelligent life would evolve at a similar rate as us. Who knows? We could be the slowest ones to evolve in the universe.
Or we could be the fastest to evolve, no one knows.
Maybe alien life has a short life span..maybe alien life is not organic like us..maybe they are so far far away..our signals hv yet to reach them..maybe they are not intelligent enough to pick our signals..maybe aliens were present before humans existed..so many possibles..
Or the quickest.
more like we are the first to evolve intelligence. The universe is super young. The era of "life" is not for a few billion years yet.
it's a great question. humans took 4b years to evolve... or at a more fine grained scale, it took us 1m years to go from chimp to champ.
parts of our evolution were very rapid... but why were we (apparently) the only ones in 4b years to evolve metal tools!?
Wow beautiful speech. Felt like a breath of fresh air to here somoene explain seti and the obstacles it faces.
That laser signal we send out will take 20,000 years to reach the centre of our galaxy. Any reply will take another 20,000 years to get back to us. If the human race still exists by that time, not all that likely if you look at current developments, one has to doubt that someone will know about something we did 40,000 years in the past.
The concept of a Dyson sphere was dreamt up by science fiction writers. Originally the late great scientist was talking about a different kind of astronomical phenomenon.
He states this in an interview which is available on TH-cam :)
Hardly, They are called ball Castor Canister Vacuums. The ball was first used in joints and then as rollers and wheels. Dyson's sphere is an old engineering design for earlier adaptions of the ball in a joint or as a roller. The Dyson sphere is just another adaption of an earlier invention. The ball castor gives the vacuum a smooth even movement.
It is not possible to completely enclose a star, the gravitational forces will riip it to bits, we Humans already know this the math does not lie with this, this is before we mention the amount of mass / material needed to do it, is literally more than all of the planets in our entire solar system.......Yea that sounds doable, sure........No species will ever build one, ever its just absurd to an actual real world engineer........
Thanks for this brilliant talk. All power to Seti and the exoplanet watchers.
Richard Sleep - They have no power. What have they produced? Nothing, really. They have proved that other stars have planets, but we knew that anyway.
@@GH-oi2jf That's a rather narrow minded view. If they were to announce a major find tomorrow would that change your mind?
@@GH-oi2jf Seti didn't prove that... SETI mainly monitors radio communications, searches for evidence of technology
The Fermi Paradox is not all that paradoxical when you consider the vastness of space and time that makes other lifeforms inevitable also provides plenty of room for our paths to never cross.
The only paradox is that it is taking so long for the scientific orthodoxy to show an interest in ufos.
@@trudytrew6337 I doubt you could demonstrate there has been no scientific interest in UFOs. The fact that scientists do not engage in unproven speculation about aliens, and don't consider anecdotal evidence as proof that these supposed aliens are violating the cosmic speed limit is called doing their job.
There is no more reason for scientists to take a position on anomalies in the sky being aliens than for them to announce claims of Jesus toast proves anything about religion.
I have no doubt scientists have looked at the information, and found it interesting, but lacking in any facts that would meet the standards of the Scientific Method.
My favorite quote of all time, which will appear in my first book next year is a full sentence from the opening quote in a large “coffee table” style book on map-making by the “National Geographic Society”: MARS WAS THE FIRST PLANET TO BE MAPPED.
We’ve got some catching up to do, mates!
Sounds about right in Biden's America today
@@michaelhunziker7287 go away troll.
This is a great post for several reasons -- not the least of is that I share Keith's name!
We see the light but not the details once it’s so far away. Life is here, life is there. It’s impossible for us to be the only life source.
If life's chance of formation is indeed a fluke of sufficiently long odds, then all the coin tosses in the Universe won't matter and we would be it's only success.
Now, I don't happen to believe that's the case, but it's important for me to say that's a preference of mine rather than something I've evidence for.
1:19 Ah Dude, Brah, spoilers!!!
Sorry, that's silly. Thank you so much for sharing your knowledge with us.
Love the new colours. New things showing up. Patience. It is time.
One of my favorite presentations on the idea of other life in the universe and why we haven't made contact was Peter Mulvey's story about "Vlad the Astrophysicist."
I like the idea that if they're advanced enough they know there's something out there to be afraid of so they're very quiet.
Haven’t we probably been underestimating the size our galaxy? I was under the impression that its estimated size is now more like half a trillion stars.
"we cant do any of this if a pandemic wipes us out" 50:52 - on January 2020. man that was close
Spanish Flu was worse with 6000 dead/day and people not wanting to write or think about it afterwards. It's been awhile since I watched _The Andromeda Strain._ How bad was that? We could have a problem if there's a Mad Cow disease that takes out all adults 20 years after eating contaminated food, similar to AIDS. Then there could be an easily-transmitted Ebola virus pandemic. Fortunately, they worked on vaccines, so might save some people.
Loving these talks!
Who says we have not? Would they actually reveal themselves in a way we would understand? The entire Universe and all dimensions contain matter we have never understood.
Good point!
Although I thoroughly enjoyed this lecture, I have to disagree with the speaker regarding how "suspiciously" finely-tuned our universe supposedly is for life.
It is a fact that nearly all of the matter and information in our universe exists within black holes. Of everything that exists, the majority is dark energy which is ever expanding our cosmos to an eventual heat death.
Of the fraction of existence that IS matter, most of it is dark matter, for which we have no expectation constitutes living organisms.
Of the fraction of matter that is "ordinary" matter (from our biased perspective) that is NOT stuck in black holes, the vast majority of that is Hydrogen in stars.
Of the miniscule fraction of ordinary matter that isn't just hydrogen plasma or stuck in black holes, the majority of that isn't part of living organisms or even planets. Of the portion of the ordinary stuff that has formed planets more or less habitable, most planets won't experience abiogenesis due to confounding factors like nearby supernovae, the absence of magnetic fields, or asteroid impacts.
If we then evaluate Earth, life had been nearly extinguished multiple times and it barely squeaked by each extinction event to proliferate again. 99% of all life on Earth has gone extinct because Earth is pretty hostile to life.
The universe is just barely compatible with our existence as it is overwhelmingly incompatible with life in general. We were merely lucky... OR potentially inevitable depending on your ego regarding the odds.
Given the astronomical odds regarding events that had to take place for us to exist, life might be SO UNLIKELY that Earth life is the only example in our galaxy. That's why people argue on behalf of divine intervention due to ego.
The truth is that we exist because somewhere in the vast cosmos all of the variables would almost inevitably be barely (but sufficiently) compatible with life arising. If the universe never produced a location with those prerequisites, no one life would exist at all. And that would be unsurprising given how hostile to life our universe certainly is. Life arising is a FLUKE given the rest of existence is bent on being hostile towards it.
There isn't anything suspicious about that. It's merely playing the odds by rolling the dice trillions upon trillions of times. Given enough rolls, you will get a run of 10000 double-six just by chance. That is equivalent to how we got here. Given the vastness of the cosmos, at some place therein all of the conditions would be met for life to start and the sequence would have occurred correctly.
It is entirely possible that the sequence of events for abiogenesis are so restrictive and contingent upon an environment that is so specific, that life might be a one-off, leaving Earth life the only example of life in the universe.
We may also just be the first intelligent life to have arisen due to the odds against that happening.
But I do agree that we should still look for it nonetheless.
Sir Gregory Dearth, thank you for expressing those thoughts and shaping my understanding of how precious Life on Earth is. Surely, you must be a world-class physicist.
some life can exist in extreme condition but not intelligent life ?
If you understand Radio waves, there is no known radio frequency that doesn't exist in the background radiation. When we use radio waves, we are boosting a signal above the background noise to a useable level. This is a very local phenomenon. Radio waves fade into the noise quite rapidly. To increase the detectable range of a signal, you either have to focus the signal or increase it's power. Focusing the signal simply means increasing it's power in a particular direction while decreasing it's power in another. What direction do you choose to point your signal? As far as increasing power goes, there is this thing next to us called the sun, it out powers anything we can generate.
Radio waves in space from life forms compared to nature is like listening for a whisper in a hurricane. We do not have the ability to detect a signal we can read at the necessary distance. Unless the aliens are sending morse code with a star....
You know.. we have trouble communicating with any other species on earth.. (even with other humans) let alone something from another planet..
Married couples cant even effectively communicate on average 🤣
Scientists are so smug. I love it!!!
No one is looking to communicate with aliens. We just want to find evidence that they are communicating.
@@1pcfred The point is that our method (radio signals) may not even be understood by other beings (and vice versa). Perhaps they use some other method that we have not yet discovered and do not understand.
@@asusean that's certainly a possibility. We don't even use radio like we used to anymore. Stations are still on the air but we've mostly shifted to more cabled data transmissions. I couldn't tell you the last time I listened to a radio broadcast or watched TV over the air. 20 or 30 years ago I did though. Like before I was online. I can remember a few years ago I was checking out a receiver's operation and I was scrolling through the AM band. I couldn't even find a station that was broadcasting in my language. It was rather eye opening. I guess media has to cater to the audience they can get?
I'm with Neal Degrass Tyson on this one. There are almost surely plenty of alien intelligent and even technological cultures out there but with how vast and spread out the universe is and that intelligent life rises and falls at different times, heck looks like we are about to enthusiastically extinct ourselves, it could be just a matter of time and space.
“Looks like we are about to enthusiastically extinct ourselves “ … I agree. We are going to overpopulate, over pollute, and deplete our natural resources. We can’t reproduce at the rate we are doing and not expect trouble with pollution and resources. And it seems no one wants to talk about it.
There is almost certainly God out there.
I have no evidence for Him but I WANT it to be true & have FAITH there are aliens... I mean God.
Neil De Grasse Tyson is no more qualified than your cat to make such a claim. There is zero evidence of aliens therefore they don’t exist until some evidence suggests otherwise.
@@HRHMANSOUR But the universe is so big... and we just CAN’T be the only ones here because that would make us special, and we can’t be special.
@@greggstrasser5791 Do you know what the odds are of a life sustaining planet being self created in a space vacuum? You would have a MUCH HIGHER chance of winning the next 200 thousand lotteries in a row. That’s the odds we are dealing with. The size of the universe means nothing against those odds.
I fully believe that they have created impenetrable virtual realities in which they can live lives that allow them to be literally immortal, live in whatever way they choose, or imagine.
There are theories to suggest our reality is just that… so what we really are looking at is no more than our own code. We are never alone with our sense of wonder.
Anyone can fantasize any number of things, I thing there's infinite sentient alien unicorn civilizations that live in a different demension, furthermore they live in a Utopia powered by ice cream fusion. See anyone can say anything it doesn't make it true. this is the problem with the information age everyone knows just enough to spout unsubstantiated claims without any logical basis. Not long ago the same people were sure the sun revolved around the sun. Not long before that everyone believed the planets were gods. Not to be condescending but most people have zero business commenting on things they don't understand.
Evidence?
Who's they?
I like Carl Sagan's take on this question--from Cosmos, episode 12, "Encyclopedia Galactica":
"If the nearest civilization is say, er, 200 light-years away, it would take them only 200 years to get from there to here at the speed of light. Even if they were travelling a 1000 times slower than that, beings from a nearby civilization could have come here during the tenure of human beings on the Earth.
So why aren't they here? There's many possible answers:
- One is that maybe we're the first; some technical civilization has to be first to emerge in the history of the galaxy.
- Or maybe all technical civilizations promptly destroy themselves--that seems to me very unlikely.
- Or maybe there's some problem with interstellar spaceflight that we've been too dumb to figure out.
- Or maybe...they are here but, er, in hiding because of some ethic of non-interference with emerging civilizations; we might imagine them curious and dispassionate, watching us to determine whether this year again we managed to avoid self-destruction...
- But there's another explanation which is consistant with everything else we know, and that's that it's a big cosmos. If a great many years ago an advanced interstellar spacefaring civilization emerged 200 light-years away, why would they come here? They would have no reason to think there was something special about the Earth, there are no signs of human technology--not even our radio transmissions which, er, have had time to *go* 200 light-years. From their point of view, all nearby planetary systems might seem equally attractive for exploration."
I love Carl Sagan dearly, but in this case, I strongly disagree with him. Any civilization able to come here, wouldn't be too interested in us, but in life in general and there's been a strong signal of life coming from this planet for billions of years.
«- Or maybe all technical civilizations promptly destroy themselves--that seems to me very unlikely.»
I would argue that any cilization capable of discovering science, must've been sufficiently curious to invent religion first. Since invented religions cannot ever be true, they must cause conflict. Science * Conflict = Extinction.
Interesting thoughts there. Sagan was a very wise man. I suppose another possibility is that while there was a civilization that could find us only 200 light years away, their planet had some sort of problem and the civilization collapsed, sending them back to square one. I guess the dark forest theory is just wild speculation.
I haven't heard that segment of _Cosmos_ in awhile, but I imagined his voice while reading the OP. I like to think that if aliens can form a sustainable technological civilization, they might have the ethic that life supports life in the vast emptiness of the cosmos. Just because they see a planet with an oxygen atmosphere 200 light years away, doesn't mean they put their all into sending a colony ship there to take it away from the indigenous inhabitants.
@@sandal_thong8631 Interestingly, if aliens on other planets 200 light years away were aggressive "the universe is ours to take", the chances of them making it here would still be incredibly slim. I can't imagine how difficult it would be for them to get a fraction of lightspeed acceleration let alone chancing a more than 200 -- maybe even 500 year voyage through space.
@@Briguy1027 More likely 1000-2000 years if they travel 1/10th - 1/4th the speed of light. Someone said a civilization that was too expansionist would likely turn on themselves since it may be easier to take over a world already colonized by their people than to transform dead worlds in a new solar system.
What a wonderful communicator.
The Aliens don't use short wave radio, or any kind of radio, instead they use quantum based communication, which is faster than the speed of light, and cannot be tapped.
Food for thought. Great presentation, loved the seminar
loved the lecture, very informative and really fun
It's quite possible that microbial life exists elsewhere in the universe. There is a HUGE leap from this to intelligent life, which is exceedingly rare. Too many possibilities for extinction ranging from massive solar ejections, to asteroid collisions to orbital anomalies and so on.
Also, anything suggesting life or the possibility of life on another planet requires the realization that that evidence is perhaps hundreds or thousands of light years old, perhaps even much older. It may not be there now,
Just so.
As an uneducated human I think this is one of the very best presented presentation by a down to earth guy, excellent.
Hmm? David....if you are uneducated...how can you judge what is an excellent presentation? Perhaps “engage brain before opening mouth!” Could be a start of something, educating yourself? Cos’.....if you are uneducated how did you “learn to read and write your comments?” Rethink your status on The Education paradigms .... and discover you Are educated! Regards!
Because how much we have searched is equal to you going to the beach with a glass, filling it with water and then looking at it going "Hmm, I guess fish don't exist because my glass doesn't have any" while standing in front of the massive ocean. The search has just begun.
well put:)
observable evidence and statistical probability point to us being alone.
@@xisotopex No it doesn't. We are unable to even confirm if a ninth planet exists in our own solar system, we most definitely aren't able to tell if something is out there (definitely is) without it coming to us or us coming to it. You don't understand how big the Universe is. We see millions of years into the past when we look at the stars. There is also no statistical probability as we have not found any life for comparison so it's impossible to measure. According to researchers we have searched one glass's amount of water from the ocean that is the Universe. In the next 50 years we will search one pool's worth. Saying that we are alone because you fail to even begin to comprehend the size of the Universe is just pure arrogance and stupidity.
@@MegaPieru3000 Not according to the Holy Bible
@@xisotopex Im surprised there are still people like you around. Alien life and UFOs are yesterdays news. Our govt works with aliens. We have bases on Mars and the moon and god knows where else, thanks to the aliens. The aliens dont trust us and wont give us everything because they know we will use it for evil. My good friend didnt believe in UFOs until he saw a fleet of about 100 of them. Someone got video of them. TH-cam' Murrieta fleet of UFOs "for the video. Ive seen UFOs twice.
Its gonna be an exciting day the first contact or proof of alien life in other places in the universe. Its just fascinating stuff. Hope to be alive to see that day.
Fascinating. Every time I look up at the sun, I think of how long and difficult the road has been to get to this point in time. Let us not throw it all away because of our ignorance.
your ignorance is gonna cost you your soul.
I'm concerned that there is every chance we will throw it all away. I just hope it's not in my life time.
@@paulm5443 You are correct in a sense. All will be lost and depending on your age it will go down in your lifetime.
Earth and humanity have the same expiration date. Probably less than 8 years from now.
Some will be saved but only a few and only those that choose not to be saved will be lost.
I think I know which group you're in
@@brontehauptmann4217 I'm sorry I offended you with my common sense.The ignorant are ignorant of their ignorance.
@@Godscountry2732 Common sense and a decent dose of applied science would serve you better.
I find it really awkward that no one laughs at his witty jokes, the mans a comedy genius people!
He is a fake fool., and people feel and know it.
Brits and their stiff upper lips. He was funny!
@@joyceswope5581 I’m a Brit and thought he was funny
This was amazing to listen to.
‘It turned out it was dust’
Bummer.
Scoop up the glass of water from the ocean and yet there are no fish. That is how much we've looked at.
ETs could be everywhere and we wouldn't know it because we've barely looked
They could also be so far that meaningful interaction would be impossible. For example if they are in another galaxy.
@@djgroopz4952 That too
@@djgroopz4952 two way communication yes . But we can still receive a message even from a civilization that may be long gone.
@@westnblu Yeah, true. Two way communication would take too long. We could observe them if they exist.
Use a microscope, there is life in the water!
Minus religion I personally find it implausible and naïve that there isn't a higher being. The utter complexity of the universe is impossible without the existence of something else.
Interesting stuff. I'm pleased he mentioned "Contact" one of my all time favourite films, as it always reminds me of how insignificant we are in the Grand Scheme (if there is one) that we are.
I'm in no doubt that there is life on other planets, but there may be 100s of 1000s of planets where life hasn't evolved into a species that could ponder the existence of life on *other* planets! 😉
That film got the Drake Equation wrong as she said 1/million of 1/million of 1/million of stars in the galaxy resulting in
@@sandal_thong8631 If that's true: fair point, however, for how many people would the significance of the difference actually mean to them to an extent that is meaningful. Those numbers are so massive that they actually lose meaning for those not having anything in their experience that would give those numbers meaning. Typically, such experience tends to come from work within the sciences.
Some people, usually westerners, are trained to feel insignificant.
I had same experience with Arrival (2016)
Glad the speaker brought up dolphins. That we are starting slowly to figure out that we are not the only intelligent species on this planet, that there appear to be a number of kinds of intelligent life is a really important point. We haven't found this before right under our nose because we have presumed that intelligence always looks like us or at least uses that intelligence the way we do.
The 2022 Nobel prize was won by three physicists proving that quantum effects are instant. So perhaps it’s possible to send quantum messages quicker than instantly meaning that using quantum entanglement it may be possible to send messages instantly, this would have the advantage/disadvantage of the transmitter not only knowing the answer before he transmitted the question but the receiver knowing the question before he’s received the question.
Information can't be sent through quantum entanglement.
Best lecture on the subject. Amazing.
I'm looking forward to picking up some Vogon poetry, I think... :-)
eww
*runs away to have a drink at the end of the universe *
Don’t do it you’ll bleed through your ears and they’ll take your towel and where you be then
The Fermi paradox, is the best argument for our reality to be a simulation , simply because the sheer number of galaxy and stars make it a certainty of Intelligent life in the universe .
but what is it a simulation of then?
@@tonycook7679 what you touch smell feel and see . The point I am making is Fermi is wrong and we are not alone .
@@tonycook7679 that is my point the only solution to the paradox is a simulation which is counter intuitive to what we as humans experience.
Tough crowd!! Nice talk, I enjoyed it. The guy was clearly nervous but he did really well. 👍
Everyone knows that eventually all civilizations end up blowing themselves up with their particle accelerators....duh.
Good thing we wont fall for that.
Everyone know this
It is known
Absolutely, it's a known fact! We'd never fall for that -- not in a trillion-kazillion-mega-million years.
It has to do with the size of the universe. It’s so unimaginably huge, that there could be MILLIONS of other “planet Earths” out there yet it’s unlikely we’d be able to find any of them.
If of course you ignore the 2004 Nimitz and 2014/15 Theodore Roosvelt sightings which could not be explained by anything from this planet, I guess it is a good question.
Yeah it would be nice if these UAP sightings were taken a little more seriously
Or the mass sight in Mexico City in 1990 during the eclipse... pretty hard to deny that
Yup, the paradox is "why do we find ETs here and not up there?"
We may not have found them but they apparently have found us. The answer to the alien-search dilemma is to look closer to home by equipping our planes and naval ships with ultra high resolution video cameras with a high number of frames per second.
I have yet to see any good evidence that they have found us.
Love this fellow! Excellent lecture ❤
Everybody always forgets about the last variable in the Drake equation. That's why we haven't found any. As he points out, we've only been sending signals for 100 years... out of 4.5 billion years the life of our star.
That, and, what sense would our radio waves mean? Those signals haven’t traveled very far, have they?
@@fredb2022 They've travelled 100 light years. While an intelligent civilization might not actually be able to know what they "mean", I would suspect if intercepted they would know they aren't naturally made, but instead from another intelligent civilization.
Correct. Our signals have only penetrated a tiny part of our own galaxy ie 100 light years. In the scale of things, that’s next door.
@@AnthonyWilliams-ew3wp Wrong! You arent counting the 14 billion years the alien signals could have been traveling towards us! Thats the proof that we are alone!
Good fluidity and knowledge.
I enjoyed this very thorough lecture of the search for other life in the galaxy.
The standard test to determine intelligent or non-intelligent life: Are they afraid of vacuum cleaners?
I agree. I’m terrified of vacuum cleaners; I must be a genius.
Fermi - My favorite of the paradoxes!
Black Dog Cooper Contact Paradox
but I love Fermis much more too 😄
Mine is Karl Popper's Paradox of Tolerance.
"Why is the Universe fine-tuned for life ?" It's not ; LIFE is fine-tuned to the Universe. That life only occurs in one small niche location (as far as we know) suggests the conditions for life are quite rare in the Universe.
And not even once mentioned the great filters... The lecture should be called "how SETI searches for aliens"
Yeah, and they're listening to radio signals. I can't see an advanced alien civilization communicating using radio waves over vast interstellar distances due to how insanely inefficient it is. Why not use lasers, light or some other technology we haven't even conceived yet.
My lecture wasn't about the Fermi Paradox or great filters - the title of my talk was The Contact Paradox, which is named after my book, and the title is not referring to the Fermi paradox, although I do briefly talk about the Fermi paradox and the great filters in the book. But if the Royal Institution would like to invite me back to give a talk specifically about the Fermi Paradox, I'd be delighted to oblige!
@@zidbits1528 Just what do you think radio waves are? We could as you say beam them instead of radiating in all directions. But radio is light. Do you have something better? Tell us.
Star Ranger Why’d they throw it in the thumbnail lol. I think they’re incorrectly promoting this lecture. Still a fantastic lecture nonetheless. RI is just attracting an audience who are expecting something much less esoteric.
@@pokeman123451 I'm not sure why it says Fermi Paradox in the thumbnail, possibly a mistake or maybe because the RI thought Fermi Paradox was more recognisable as a SETI topic than Contact Paradox, and would get more people to click on it. Either way, I'm glad you enjoyed my lecture!
For me, I think many alien civilizations exist. I just think they might not be close to us, or they could be -- for all I know. We have barely begun to survey stars, so we can't say they don't exist.
We cannot say they don't exist, but we certainly cannot say they do exist....like some do. All we can say is we don't know and the average person hates uncertainty they really want to fill in the blanks even if it means lying to themselves. Pathetic
Because we float, alone in the deep void. No god, no aliens, just us, alone in creation.
Because they lived a long time ago in a galaxy far, far away.
oldatarigamer ❤️👏🏻
Exactly! They are either already dead or don't exist yet
@@molo600 Or it's the start of Star Wars!?