10 Strange Ways Time Travel Could Be Possible
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- เผยแพร่เมื่อ 10 ก.ค. 2024
- An exploration of 10 Strange Ways Time Travel Could Be Possible without violating the laws of Relativity.
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"Someone once told me that time was a predator that stalked us all our lives. I rather believe that time is a companion who goes with us on the journey and reminds us to cherish every moment, because it will never come again. What we leave behind is not as important as how we've lived. After all Number One, we're only mortal." - Jean-Luc Picard
Ah yes, back when Star Trek was thoughtful and philosophical, and put an emphasis on kindness, understanding, and the more beautiful aspects of the human condition. Those were nice times.
Sometimes time is time consuming so spend time on a dime.
I wish I could be that optimistic because I say fuck time is a dick.
That was very poetic until he addressed Commander Riker. Lol 🤣
Time is merely the local rate of change. Within that is a chance of damage or death. We can avoid it only until it catches up with us. Some welcome it with open arms.
JMG's top tens are the best on youtube
I'm looking forward to downloading the Tachyon Anti-telephone app on my new smartphone. What? Put me on hold? Yes I'll wait.............................
1:20 future: extreme time dilation
3:55 future: black holes
5:31 future: suspended animation
6:58 past and future: many worlds
8:25 past and future: Alcubierre warp drives
9:42 past: the tipler cylinder
11:30 past: the anti-universe
12:40 past: the one electron universe
14:36 past and future: wormholes and time
15:32 past:tachyonic anti-telephones
Thank you man. Love Mr. Godier, but sometimes I like to be able to pick around some of the concepts. Thanks!!
Time is a fire in which we burn
Many Thanks! By the way, as another variation on rotation (probably related to the Tipler cylinder), remember that part of the interior solution for the Kerr metric includes closed timelike loops (albeit inside the event horizon...) - and most stellar black holes _do_ rotate, sometimes even close to the maximum possible amount
Thank you!
You content is pretty damn good... thanks for all your hard work.
If these top 10 list were playable on Spotify for free life would just be better. Regardless love ya john and appreciate the work you do for us.
One of my favorite channels, you never fail to put my imagination into overdrive.
He really is so good. I should comment more to help the algorithm. I love every video.
Thank you JMG. I legit felt happy seeing I got a video to watch tonight after a very long day. You are awesome bro
The Tachyonic Anti-Telephone figures, if unintentionally and peripherally, in John Carpenter's horror movie, "Prince of Darkness" (1987). in which scientists of the future try to contact some of us now, through dreams, to avoid the Apocalypse.
There's also an excellent (although very cheesy) prog metal band called Ayreon that explores this concept.
Perfect way to start the weekend; Thanks JMG!!!
Thanks for the great video, John. Your video that introduced me to the "Silurian Hypothesis" eventually led me to discover Hogan's Giants series. That has been quite a read for me so far. Thanks for opening my mind back up to what used to be childhood fantasies.
Technically every time you drive-in your car your time travel. but, you can only move forward🤔
And to look into the past you already have a device built in- the rear view mirror
That last suggestion gave me the shivers. Imagine finding out you were your own ancestor because of future you sending your genetic data to the past somehow.
The clone thing didn't really do it for me because you're not even sending a replica of yourself back in time, just your biology without the mind inside of it.
🎶 If I could turn back time 🎶
I love this channel! Thank you for everything you do
Love this channel so much. I play it nearly every night, letting my mind dream of the possibilities of the universe before drifting off to your relaxing voice. John Michael Godier, we appreciate you.
I think memories are the only form of backwards time travel we can accomplish.
It would take crazy bandwidth, but maybe uploaded minds could travel back in time. If they send their brain, body and a suitable environment, then from their point of view it should be legitimate time travel. The "just a copy" argument doesn't apply if the pattern which is paused in the future resumes operation in the past.
@@JB52520 well the possibilities of paradoxes might prevent it. Changing even a single seemingly meaningless decision long ago can change the entire direction of one's life l
Preventing them getting into position to travel backward to begin with
@@JB52520 thats a very interesting concept
@@JB52520I don’t even think you could cease your existence if you end up killing your grandpa or something if this could be the case- you’d simply be traveling your own brain using this method so you’d return back to your present place
What about a Kozyrev mirror? . . . . . I'd love to see you do a whole video on this!
Bill & Ted better be on the list!
I watch you every single night. I love these videos and the knowledge as well as entertainment is amazing. Plus your voice puts me to sleep. I mean that in a good way. Lol. Thank you for the amazing videos
Here since 4000 subs, great to see this channel grow!
Exactly when did you find the channel.
Thank you for your videos John. Your channel is my favorite on TH-cam
These are still my favorite, john, over the event horizons.
Very clever suggestions on how time travel can happen, some I've never heard of before.
My favorite way to time travel are your videos. I turn on a playlist next thing I know it been 6 to 8 hours!
been watching you for several years.. first time being in the top 1k. great vids
As many times as I've ever thought about the possibility of time travel, I've only came up with only two possibilities. This guy came up with 10 ways. Total genius! 🧠
I came up with 11
Always love a good talk about time, even if it takes time to understand. How about the subconscious part of our brain traveling backwards through our lives from the point of death to be reborn as the conscious mind, living backwards for however many years we lived? A "groundhog life" if you will. Thank you for making these.
This is a good video John. Real Good.
I appreciate it.
My mans always putting out high quality videos
Another great video!
"This universe already allows for time travel. Just go really, really fast"....and turn left---Ricky Bobby, time traveler
Shake n bake!
I love your videos man! 👍🏻
Such an amazing video. Always so full of wonder.
Thank you for making the vidy John : )
I haven't got time so I'll listen to this last week.
Thanks John
The one electron theory is one of my favorite theories in regards to quantum mechanics. It also ties in nicely to my "one consciousness" theory where we are all the same consciousness traveling backwards and forwards communicating and interacting with our own "spirit" on a different timeliness. The cosmos are a fascinating place
This is a really good one
Interesting and worthwhile video.
Fantastic video, John! Thanks a bunch!!! 😊
But, well... There's no time like the present!
Stay safe there with your family! 🖖😊
Fascinating! I love this stuff!
Very interesting as per usual 👍
Every time we sleep, we go in suspended animation. So we time travel by this "conclusion"....
Novikov self-consistency principle!!! That's the one I was trying to remember!!
Hell yeah great topic
Best. Channel. Ever.
Here’s the rub. To properly define a result, you have to properly define the conditions. Time doesn’t have a direction, it only has cadence. We tend to confuse entropy and causality, operating at a cadence, with time. Our calendars and clocks, neither of which “measures” time only confuse the issue. The cadence of time is locally variable, hence your observations about “traveling into the future”, but now-tomorrow is just as much of an illusion as now-yesterday. Turns out, we just live in “now”.
How to time travel with a tachyon telephone (and some additional scifi technology:
1. Send a scanned copy of your mind to the past via tachyon telephone
2. Have the copy downloaded into an android body and used to do whatever you want to do in the past. (Explore, influence events, etc.)
3. Have the memories of that android preserved and stored til just after you sent the message back.
4. Have the memories added to your own memory.
You have now subjectively experienced time travel. You literally remember going back in time, interacting with people, etc. You could even regularly visit someone in the past using this method. There's definitely a sci fi novel to be written about a romance occurring across multiple centuries.
Imagine finding out when your scanned mind gets back to you that you are your own ancestor 😂😂😂
Sounds to complicated. Basically you sending an android of yourself to the past to experience the past to input to yourself. A lot of complications waiting to happen
"Convince" your grandfather... That really is a family channel 😁
Mind blowing video
Thanks!
Well timed video. I'm in the middle of reading Tau Zero
Another GOAT’d video 🐐
You can have one thing: Either Universe or time travel. Choose wisely. Oh, wait. You can't choose.
Viewer #10!!!!!!!! You rock Mike!
Hello fellow time travelers!
The hardest thing about travelling through time is that you can only do it once...
❤❤❤❤❤Great post” thank you❤
Thank you
Negative energy is regular energy with time running backwards. This is so obvious that I instantly grasp it. You can't find some negative energy to make a device to go back in time because negative energy means you are already going backwards through time.
Another superb video, I can't help thinking that the notion of time travellers is akin to the Fermi Paradox, if Time Travellers exist why aren't they around us today?
Maybe they are and we just don't know it.
Or maybe it's because we're not important right now, I mean think about it, aside from curiosity, could you justify a trip to a random wednesday in the 13th century, when the energy requirements for time travel might be incredibly prohibitive? They would probably want to time travel to dates that are really important to them, from their relative perspective, and all of this stuff that matters to us is rather mundane to them.
Maybe there's a limit to how far they can travel back, like for how long they can sustain their movement through space and time before they need to stop, either due to energy constraints or dangers presented to their own safety, and so they can only travel back a certain number of years, and we're still out of range, maybe there will be one point our future where suddenly we have a boom of time travellers, because we have entered their travel range, and everything will be chaos from then on.
John. How about an essay about negative mass and what it really means both practically and a touch of mathematically. And how it would effect the way we liiiive.
It's coming soon. I'm embargoed yet, but there is a paper coming out relating to it. As soon as it's out, I'll do a full essay on the whole subject.
Fascinating, in 1818 Mary Shelly wrote her Frankenstein novel about a doctor reanimating flesh using an electrical charge from lightning. Today we use electric defriblators to restart a human heart.
6:28 okay that pitch drop in your voice terrified me and this isn’t even a October video
EXCELLENT ! IF NOT OUTSTANDING ! MANY THANKS ! MR. JOHN MICHAEL GODIER . FROM, U.K. (2023).
That idea about sending a clone back into the past to vicariously experience and report on it for you has legs.
Love the advertiser friendly grandfather paradox😅
Theoretically, assuming that in the future we are able to “upload” our brains to a digital form, we could use the Tachyonic Anti-Telephone idea to not only make a clone, but to send the “brain” back with them, right? That is, assuming we were able to give instructions how to “download” the consciousness into the clone…
Also, they would need the materials to be able to create the hardware that made that possible.
6:41 “Having left the present the moment they went unconscious to wake up in the future, whatever the date may be”
That is one of the main ideas in the movie Idiocracy. Such an underrated movie that is one of the best sci fi comedy movies ever made. Really love how the film predicted our modern day society and people of today so perfectly
This is tragic. Do you actually think Idiocracy is a documentary? Go outside
@@zed739 westerners get dumber every day. We have the pinnacle of knowledge in our pockets and the average person is as ignorant as old people that didn't have ez access to information.
I rate Idiocracy highly!
I haven't watched the Time Machine in years, that's what I'm going to watch tonight.
i love to think about the time traveler paradox like going back in time to warn about the future, returning to the future where you dont exist, warning people in the future about the results of time travel, now nobody will time travel to the past, making this entire situation impossible. im curious about what can happen.
It seems like the only way to avoid such paradoxes while travelling backwards in time would be to travel to a parallel universe! Mess with another universe's past and you'd still be around!
There is quantum imortality where events have not happened yet, like your untimely death. Maybe dont stop there. Mayne your jackpot pull of the slot machine is just around the corner?
Or perhaps, youre never meant to die, youre never meant to get rich, but your soul is meant to learn some things before youre unplugged.
Possible you paid good money for this ride.
The issue with the grandfather paradox is that "causality" is dependant on matter and energy not being created or destroyed. If energy can spontaneously appear without cause, then there CAN be actions without causes.
With "backwards time travel", you would have to inject matter (yourself) and energy (assembling matter into place) from "outside" the universe at that reference point. Thus, the "time Traveller" is a new event without a cause and can do whatever.
Similar to the thinking that teleportation is creating a new clone of you somewhere else while dissolving your current body/consciousness. The game Soma explores a related concept.
There is no paradox IMO. If you go back and kill your grandfather you create a different timeline. There is an infinite amount of timelines
Nothing. That's what will happen. Nothing. Time goes one way.
Please, do not attempt to refute what could be our
Bone of contention : You are Brilliant!
Step 1) Create a tachyon phone and wait for a call as soon as you turn it on
Step 2) Orbit a black hole and travel back to Earth
Step 3) If it sucks, call yourself on the phone exactly after you built it and say don't come
Step 4) That won't happen cause you never got the call and therefor the future is great!
Been watching for years. First comment. Love the content!
Sci-fi idea: Man travels to the future in a quest to achieve immortality made posdible by technological advancements. He discovers that immortality in practive is horrifyingly unappealing, if not cringe
What if there was a way to manipulate the Higgs field to decrease the effective mass of anything in a tiny pocket of space? That could allow something to vibrate back and forth at relativistic speeds without having to accelerate away from Earth and then returning.
increase or decrease? 🤨Either way, We'll have to find a way to isolate that pocket of space from the rest of the solar system, Morty.
If you decrease the mass of something like the sun, or sag A star, we could end up breaking loose and flying off into the great beyond to become a rogue planet. Not great.
If you increase the mass of anything to that of a black hole within the solar system...very bad things happen, very quickly.
If we isolate your oscillating singularity machine, that kinda kills the whole purpose of it being nearby.
But you know what? I'll give you $100 for 70% of the company, and I'll bring in Pedro, who can fast track the manufacturing process. He has a truck.
Supposedly the Higgs Boson only accounts for a small portion of mass. Most mass comes from the vibration of gluons. At least according to Anton Petrov's channel.
You say so much without saying anything coherent.
Good thinking, really. The answer is "kinda." In QFT, fields just _are._ It's certainly possible to “manipulate” fields, as all particles are excitations of their corresponding field. These excitations are quantized. An extremely energetic photon of gamma-light can interact with the electron field and transfer the excitation of its (photon) field into two excitations of the electron field, one positive (electron) and one negative (positron); these excitations cannot be smaller than the quantum of the field: electrons come only in whole units. (Strictly, for pair production you need electromagnetic field for balance to check out, i.e. more photons, but that's a technicality). An excitation is like a soliton wave in a channel, or like a single wave that you can see running along a piece of thick rope, the heavier the better: if you quickly jerk its end up and down, you'll see a single wave running down the rope. It's a good visual analogy. Some fields interact, or _couple_ one to the other: for example, electron field couples to the Higgs field, and this gives electron its mass. The coupling strength is also a constant of nature, we cannot do anything to change it. However, the Higgs field is a tad unlike all the other fields: in its vacuum ground energy it has a non-zero value, and this vacuum energy level was higher until the Universe reached the age of 10^-12s, one trillionth of a second, when it cooled enough. So yes we can, but bumping it up requires unimaginably hot conditions, and its quantum, the minimum by which it can be excited, is huge. A whole LHC is required to heat up a “tiny pocket of space,” and a very tiny one, to such energy.
There are two important points, however. The second is going to be quite a steep dive, fasten your seatbelt.
First, as Free Hat said, nucleons (proton and neutron in the nucleus) are composite particles, of three quarks each, and get just a bit more than 99% of their mass in the form of binding energy of the strong interaction, which keeps quarks together; the rest comes from quarks coupling to the Higgs field. But there is no wiggle room there, too: still the same QFT fields and their quanta; also, there are rules in the theory that prohibit some states, and define quantities that are conserved. And mass of all the ordinary matter comes mostly from atomic nuclei; electron is 1800 times lighter than proton or neutron. Nearly all of ordinary mass comes from the energy of the binding field inside nucleons-in gluons, which, just like photons, don't even have a rest mass. This is a lot of energy: the strong interaction is called strong for a reason. :)
Second, and a much more important thing: the Standard Model is built on top of QFT, and, as with any theory, _objects exist in that theory, not in reality._ Fields, excitations, coupling constant, and all the maths of it are just words in the language of the theory. It's extremely precise in its predictions, but we know that we don't know all there is. QFT fields live _in_ flat background spacetime of Special relativity, its incompatible with General relativity, which is background-free, and describes how energy content curves spacetime, which is flat only in a small patch of it, mathematically only at a single point-of course, we can ignore curvature of very large patches where this curvature is small. Space mission trajectory planning uses Newton mechanics, assuming that the whole Solar system is flat in spacetime, and even in space and time separately, and it's a good enough practical approximation: perturbations from every piece of rock or ice flying there are more that can be accounted for, and are larger than the error. But the conditions of the Big Bang, or Hawking radiation require both theories, and their fundamental incompatibility requires assumptions and approximations, and we can only approximate even the approximation error. GR cannot be quantized. SM predicts zero mass for the neutrino, but we know from experiments that they have a tiny mass. Dark matter is not in any of these two theories. GR predicts singularities, but infinite energy density is non-physical. We don't care too much about these singularities in black holes: whatever they _really_ are is so much smaller than the event horizon, the limit of all observable stuff, that their real size and nature is unimportant. It's the singularity at the Big Bang which we do care about.
We are certain that both theories are incomplete, they don't capture all observations. They are very precise only within their limits, we know these limits, we stretch them as much as reasonable, but we don't know how to calculate far beyond them. Don't underestimate, they describe things they can describe with an extreme precision, but they both fail here and there. Theory is a description of reality, but it's not the reality-just like _a map, however precise, is not the territory._
And then, space and time-or rather spacetime-may not be part of the reality, rather the way we think about it. We evolved to perceive space and motion-your brain performs immense calculations to control a few dozen muscles when you catch a ball. And relativity speaks in the language of events and intervals between them, although, being a classical, i.e. non-quantized theory, it allows to calculate motion with arbitrarily high precision. But QM, and thus QFT, is even more counterintuitive, with all its quantum weirdness and non-local “spooky action at the distance.” Whether time and space are “real” or not is a philosophical question; physics is not concerned with answering it. They are certainly _useful and intuitive for constructing theories,_ but that's all in it for physics proper; and it's intuitive because we _evolved to perceive_ time and space as real. But _time in physics is part of the map, not part of the territory._
Isn't that what the Alcubierre drive "does"? It creates a pocket of space that is detached from the higgs field with a local higs field with in it. However I wouldn't want it to vibrate back and forth, but in a smooth circular motion.
The past tachyonic angle makes me think of the doddleston messages.
Time travel is going on now. You’re traveling forward through it and you can’t stop!!
When I tried to travel 0.9 C the Chicago Police gave me a speeding ticket for $47 billion. The only way I could raise the money was to collect my bill from my tachyonic anti-telephone service provider, which starts at zero and climbs over time to larger and larger amounts that the provider owes me.....
I got pulled over for doing 60. The cop said the speed limit is 25 miles per hour. I explained that I was only going to be driving for 10 minutes. So he wrote me a ticket for doing 19 under. I went to the court and they gave me $185. I was 3 days past the 30 days though so $45 of that was late fees.
This is interesting but very simplistic. For anyone with an active mind there is nothing new here. But good reminders of general thinking.
Good video 1!!11!
One of the key things to anchor our understanding is that the speed of light is the speed of reality, or the speed of causation.
You can't go faster than the speed of reality or the speed of causality. In fact, calling the speed of light a speed limit is redundant.
Nyt on oikea aika!
"we're all natural time tarvellers" is like saying we're all natural spaceships, speeding through the universe
Thanks Jhon, like i said in your past video, maybe its a rule of the universe that you cant go to your same universe if you go back in time
Considering what could actually travel through time, not only faster than object or light traveling naturally, but maybe even instantaneously, I kind of
considered information to be a good candidate. This led to an interesting thought process:
Imagine information could travel spacetime instantaneously, set apart how (tho maybe Bell’s non-local theorem or spooky action at a distance may be involved), three things would matter: 1. what is the origin of the information? 2. what would be able to receive this information? 3. what would be the content of this information?
First we’d have to conceptualize that some observer in our Universe through some means is capable of realizing that information is being received. These means could be technological or organic or a crossover. It could require an external machine, but even our very brains/nervous system could be considered as such means.
As creatures of language that evolve epigenetically through ever complexifiying syntactical programming, it could be tempting to consider our own organic presence as a receiver of information. What we have considered as random processes, spontaneous insights, visions, dreams, intentions, intuitions and the physical actions and changes that resulted from it, combined produced all of human history to happen.
On one hand this can be viewed as a mysterious force of Nature and evolution that we don’t dare finding an answer to, but our very being here is a result of some process that triggers these actions to result from what is going inside.
What we qualify as “random” and “spontanous” from another point could be viewed as a collective antenna that over millenia slowly downloaded a self transforming library of thought structures that shaped our local environment.
What if this spontanous information has a source? We are receiving something. Maybe Nature found a way to connect an primate organisms neurology such that it became capable of receiving or connecting to a source of information that exists, in the future, travelling back through time to reshape its past or rather: that exists outside of ordinary (to us) spacetime, to become able to enter a physical reality that can be shaped according to it’s own imagination. This source of information would be an infinite expression of pure limitless imagination, without boundaries, that finds joy in connecting to a part of reality where limits are dominant - and in connecting with this limited reality, become able to change that local reality into a reflection of itself: a creature of pure imagination.
As such, human organisms are the receiver, the sender this creature of pure imagination and human history the effect of it’s connection.
If as such, the goal of human history is to turn local reality into a reflection of this creature of pure imagination within the limits as defined by our world, we would find human history to result in changing the receiver and the local reality into an reflection of itself: we would become creatures of information and imagination with limitless creations of art, culture, technology and this is exactly what we find ourselves to evolve into.
Human history is the time machine and it has made us unrecognizable to our past versions of ourselves. As we slowly transgress into worlds of AI with more unlimited creative powers, and the values of this force of imagination and creation becomes dominant - even the monkey body becomes irrelevant as more and more media for these values to persist and transform local reality become available. The body loses its importance as this force of imagination that seems to appear from outside of time, gives birth to itself more and more, so it will be able to see itself, through itself in everything that it has created, by all limited means available.
And as it reaches this singularity, it is able to change local reality instantly and by choice: and it will fill this reality with observers realizing that they themselves are doing what has always been dreamt of: travelling time by getting rid of it.
The time is the fire in which we burn, but how toasty the temperature actually feels to the local observer is adjustable by any scalar reparametrization of the inner sight
1. The cool thing about future extreme time dilation is that barring societal collapse from your home species it's possible to go so far into the future that it might be possible to run into the tech to take you back to the past. I wouldn't ever recommend doing this, though, because all it takes is a societal collapse and you're alone for (most-likely) forever.
Pretty depressing, would just have to keep going farther into the future like Futurama
Oh John
I get the feeling that the "arrow" of time and the fact we don't see negative mass/energy are very related somehow.
The latest paper "Relativity of superluminal observers in 1 + 3 spacetime" explores the concept of FTL and tachyons. What is strange to us may be ordinary to someone else. So-called 'paradoxes', for example, exist only for us, considering the issue from a limited, three-dimensional perspective.
For higher dimensions and 4 or 5-dimensional geometry, such a paradox as the 'grandfather paradox' simply does not exist, as 4-dimensional geometry is different.
Here's a fun 'Fermi-like' paradox for you, John Michael - if travel into the past is possible practically, and not just theoretically, where is everybody?
Time travel paradox's don't require the past being an alternate reality or a multiverse. Travelling to the past only requires the resetting of the universe to a previous state, NOT moving backwards in time. The moment you "activate" a "time machine" is a step forward in time from the moment before, the moment you step into the "past" is step forward in time from the moment of activation. Time never stopped moving forward. If you kill your grandfather, it does not change the past, only the future. You don't cease to be, but rather another you will not be born in the future. There is no paradox.
Wow…you referenced Delmore Schwartz…nice. Velvet Underground?
As I recall Lou Reed actually knew him. But yes, I do enjoy the Velvet Underground.
1. was actually used as part of the plot in John Carpenter's movie "Prince of Darkness" where a mysterious dream actually was a message from the future.
JMG my dude!
Not time travel exactly, but I find media from the 19th century fascinating. Closest I'll ever get. For instance there's a concert recorded inside of the Crystal Palace in London in 1888. It's eerie to hear the voices of people from that long ago recorded inside a building that's been gone since the 1930s. A newborn baby who attended that concert would be long dead before most of your audience was born even if they made it to 100.
What gets me are the colorized and digital frame rate increased film footage from the early 20th century. It comes to life, and then you think, not a single person from that 1905 footage is still alive, not even the kids. Even more, those videos if still around in a thousand years will be archeological treasures in the same way as if we had footage of the Middle Ages. If not time travel, our growing pile of media represents a kind of digital immortality.
I would have to say my favorite is the one that is the most probable. I call it the Entangled quantum telephone. We build such a telephone send it off and when it arrives and turn it on. As soon as you start talking to someone, you run into many paradoxes, including the future affecting the past. Say it arrived at a planet 100 light years away and then you start communicating. When they look at you threw their telescope they see you as you were 100 years ago but at the same time they are able to transmit information to our present day. That information will influence our decisions for our future which is technically their past, so they could technically influence their past from their present. As I said it creates all kinds of paradoxes and breaking causality etc and it's probable to achieve.
It creeps me out that we can never know if a time traveler is changing our past because we never experienced the original timeline. The nanosecond the traveler sets foot our access to the original timeline is lost to us forever.
Only a 6 seconds but that's an awesome intro on the audio
I know little about time travel but I do know a few "Space Cadets" lol