My grandfather left this comment.

Jake was voted 'most likely to travel back in time' class of 2094. Great video, as always!

The biggest problem with time travel is that nothing is stationary, as the moon revolves the earth, the earth around the sun and the sun around the milky way, time travel isn't just about moving through time but also distance... If you were to travel back in time 100 years to the exact same position you are in right now, the earth would not have arrived yet, it would still be millions of kilometers away. So not only would we need to figure out how to travel in time but also where everything would be relative to that time period and how to distance that gap via some type of wormhole, then you have the relative motion of being here on earth to whatever time period you travel back too, if you don't match up precisely with the rotation of the earth, you're relative speed could be different by thousands of kilometers/hr simply causing you to instantly disintegrate on impact or simply burn up in the dense air...

Make a 10 hour version of this as well 😂

One of the coolest explanations on time travel ever.

I will never forgive him for not naming his book undeNYEable

I swear I've seen this exact video, waaaay back some time in the future ..

If you back in time and make WW1 never happen, then you would have been raised as a child taught that WW1 never happened.

tacocat tacocat tacocat tacocat tacocat tacocat tacocat

I tried that Grandfather Paradox thing and I'm still here. Was time travel critical for that or something?

4:49 TOP TEN ANIME PLOT TWISTS THAT WE NEVER SAW COMING

He looks like Bill Nye

To sum it up, the Three Theory's of Time goes like this: 1) The Multiverse Theory: if you go back in time to stop something, you don't actually stop it, you just go into a universe where it Didn't happen (Example: Future Trunks from Dragon Ball Z) 2) The Butterfly Effect: if you go back in time and change the smallest thing then everything changes, for example: if you go back to the Dino's Age and kill a Spider, you just killed all of the Spider's children and grand children and so on, and by killing those children, the flys took over the world 3) The Set Timeline Theory: this theory says that time is shaped like a line and cannot be changed, for example: if you go back in time to Kill Hitler as a Baby, then Hitler himself wouldn't die, another baby will just grow up to be Hitler and there's nothing you can do about it because it already happened

All the Vsauce3 Vsauce2 Vsauce1 Should have their own T.V shows!

Nice job with incorporating the ending into the beginning. Its a lot more original than most videos like this and I wish that more people would do it like that.

Even if you could change a event would it be worth it? Such as going back and saving a lost love one. You would have to come back to present time after saving them, and thus wouldnt that split off the universe or make you jump to another? Your original universe timeline would still exist and people would go on as if you disappeared. So you would be in a new timeline, wouldn't there then be two versions of you? Saving that lost loved one, seems to me wouldn't be the same version or the same essence of the one from your original timeline since they were saved. So i probably wouldnt do it. I even think going back and doing something really subtle such as accidentally killing a beetle or ant alters the timeline and could perhaps make you jump to another since that insect didnt die that way or at that time in the original timeline you came from. But then again this is all theories lol. This would all be redundant if the timeline accounted for you traveling there in the first place lol

Creationists must love this episode because if Bill Nye never existed there would be no way for him to completely destroy Ken Ham in a debate.

What Bill Nye is actually saying at 2:00 is pretty much "time is not a straight progression of cause to effect, but actually a big ball of wibbly wobbly timey wimey stuff

watched this when I was in middle school and I still think about it often, the filming just gives me a odd dream feel that I’ll never forget

Bill: You're traveling through time Jake: Yeah So casual 😂

Paradoxes are cool! Gimme more, I like to feel my brain melt XD

You can totally travel through time. What you cannot do is travel _back_ in time. You can travel faster than your peers and you will literally travel forward in time [relative to those you leave behind]. My father was an airline pilot. He spent about 60 hours a month traveling at around 550MPH. I worked out the math, based on his number of workdays per year and whatnot, to find that he was about 0.082 seconds younger than everyone who was born at the same instant he was born. Whee. You can go *really* fast and slow your time down and relatively, speed up that of everyone else. But when you get to the future, all you can do is keep going. You can never come back to now.

When bill bye dies jake should replace him

how'd u get bill gates in ur video

But these paradoxes only apply if you subscribe to the notion that time is _linear_ instead of branching off into different universes.

Jake would make a really good Doctor Who.

This is one of my favourite videos of all time. I always forget about it and then come back to it months later only to enjoy all the more when I remember it exists.

Never have I found a KZfaq video more fun to scrub back to the start to watch it all again to make sense!

Even though time travel would be a pretty cool thing, there is one major problem that goes along with all the other problems but no body talks about. The problem is is that if you went back in time day 20 years, you wouldn't be standing in the same spot you were in present time. You'd actually be on the same spot in space you were before you traveled back in time but you wouldn't be on earth because earth and the universe are always moving. So earth would be wherever it was 20 years ago and you would be in space, dead. There's probably already a theory and a name for this already but I haven't really liked into it.

They say that traveling backwards in time is impossible. Only forwards. What if what we percieve normal forward moving is actually time moving backwards and we cant go forward until it hits a certain point, or the origin of the universe? Then it travels forwards. Also another thought I had is what would be like if it not a backwards and forwards motion, but also it could move left or right? Time itself is a paradox. There is no past because that state does not exist anymore. Time can't stand still so there is no present. And, there is no future because it doesn't exist yet.

I feel like Jake and Michael deserve their own show on the science channel or something. The way they explain things visually along with verbally really helps me understand these things.

*travels back in time, becomes past self with no recollection of going back in time, creates useless closed time loop*

His T-shirt obviously says Pluto, but the P and the O are covered, which leaves LUT?!?! Coincidence, I think not!! :D

I love how this video was made in such an entertaining and interesting way!

This is exactly why I gave up time travel.

who kinda thinks bill kinda looks like jake's dad, lol

Is only the 3 letters in the middle of the word Pluto on your shirt showing to make people subconsciously think of LUT on Vsauce?

One of the best vsauce videos of all time

I love the writing. Jake’s second weakness is his acting. The first one is his ego preventing him from hiring some good actor.

BILL NYE THE FUCKIN SCIENCE GUY!!!!!!!!!!!

What if your life is a strait line, no matter what. Jumping back and forth threw time doesn't change anything, your life is still a strait line. If you run into a paradox like killing your grandfather, is it not possible that you'd continue to exists, because that's not your grandfather but rather when you time traveled you created a another universe in with you were never going to exists. Because you killed your grandfather but that's not your home universe so it doesn't effect you.

I'm sure this guy has like an unlimited budget or works for a studio but I love his videos their well-designed and the graphics and everything he puts into it

Vsauce3: gets killed Also vsauce3: this is great!

What about the alternate timeline effect. Where you go back in time, change something in the past, and that singular timeline splits into two timelines. One where you changed the past, and one where you didn't change the past. I believe that this would be one of the only ways for time travel to exist. Then again, if it existed, why hasn't anyone come to the past yet?

I always liked the idea that if you changed something in the past, you're not altering _your_ reality, just making the timeline split into two realities. Ever decision you've ever made (or not made) has created another timeline in which you did something different. There are an infinite number of realities in which ever possible thing that could ever happen has happened or will happen :3

This was the best visual explantion of time pardoxes I have yet to see...

Doctor Who explores at least 1 and 3. Reply if you want examples as I can't be bothered right now to write them unless I know someone actually wants to know. If you do please don't hesitate to reply to ask me for them.

Time travel paradoxes seem to negate the concept of multiverse, though. Look into your memories, this is your history, things that happened to you. This is immutable. You are here to read this comment, therefore you have not yet died. History, in your paradigm, is absolutely unchangeable. If, by some work of science fiction, were to travel into the past, you could not travel into YOUR past, only THE past. There may be a younger version of yourself there, but it would not be a younger version of YOU. If you were to accidentally or maliciously kill that younger version, you yourself would not cease to exist, because you lived through that day, and didn't die. In the alternate paradigm you have placed yourself into, they are robbed of the shining star that is you, or rather, the younger you, because the older you is still there, having just killed your younger you. Time travel into your own past violates the laws of physics, most notably the laws of thermodynamics. If you were to travel into the past, it would not be your own past, but an alternate past, identical to your own, except for the glaring addition of the time-travelling you. The timeline would progress forward, with or without any changes or lack thereof that you make. The changes to the alternate timeline do not in any way affect the original timeline you traveled from. The time travel paradox only exists because we look at the universe in a singular fashion. When you factor in alternate universes, and the laws of thermodynamics, the paradoxes go away, because the things we thought couldn't be changed, in fact, cannot be changed.

Question about the grandfather paradox. So you go back in time and kill your grandfather so your parents aren't born so you're never born. But that means you could have never went back in time to kill your grandfather, creating the loop. But doesn't the paradox assume that everything is predestined? If you went back in time to kill your grandfather...why wouldn't it just rewrite history and change the future? You go back in time, kill your grandfather, you're never born, and time moves on without you. Because you changed what would have happened in the first place.

One of my favorite if not my favorite video on paradoxes ever.

I love how he used OoT, he could've also used the entire game as the example. Also he could've used MM for the Predestination Paradox.

I absolutely love the more cinematic feel Jake is implementing into his videos, it makes this content as much educational as art itself, and its amazing.

This reminded me way too much about steins gate

as a child i had a book called there is a monster at the end of the story with grover and it is all about grover trying to stop the reader from reaching the end of the book but the end (spoiler) has grover find out he is the monster. i feel like this would be a time paradox

(In a nutshell) Bootstrap/ Predestination; find a book *reads how to build a time machine,* no author, no names mentioned, just instructions. You’re curious enough you build it, and after time, you finish building it. You use the time machine to go back in time and put the book just where you found it. Therefore creating a loop without end and creates a different universe.

This looks like a doctor who episode.

i have a time machine, it brings me one second into the future every second

dude all 3 of the vsauce channels are masters of jump cuts

answears to the paradoxes: its helpfull to think of time like a painting where everything is already begin and end at the same time first one: in these cases there is an alternative time where you did something to make it as it is in the first place, and now it will allways repeat itself without any trace of the begining as if that alternative time didnt exist second one beyond the alternative time there are no changes in this worlds perspective the time traveler wouldnt poof out, he would simply be something that seemingly come from nowhere and became part of that reality. third one is the grandfather paradox where you go back in time to kill your grandpa and wouldnt be born, you wouldnt magicaly poof out of existence(again) life would just go on, that was simply a alternative consequense of his grandpa living that will only reside in the memory of the grandchild

The real question is how is the phone ringing ?

dragon ball z actually does a really good job with the time travel and alternate timelines in the show

Hey Jake! Twistkit here, and I'm here to talk about a little bit of stuff about time travel. 1.If somebody did invent time travel, nobody would want to use it, in case of dying. The Earth is moving around the sun at a relatively fast rate, and if you moved i time even a little bit, you most likely would not be on the planet anymore. So have fun exploding. 2. If somebody did solve the "Time-Earth Movement Effect", There is also the problem with viruses. You body is always developing a stronger immune system, always making defenses against certain bacteria. You also carry them with you, but as almost everyone's immune to it, you and everyone else id fine. If you travel back in time, you carry the viruses with you andare in danger of killing everyone, as their immune system has not put up defenses. If you travel forward in time, your defenses aren't built to survive the new mutations of viruses, and you would most likely die. Those are some problems with time travel, and as always, thanks for reading.

OMG THIS HURT MY BRAIN I LOVE YOUR PARADOX VIDEOS

Its just lovely to see how Bill and Jake fit together so well. Jakes like a younger version of bill nye .

Even if time travel is possible, which it is according to math, what if when you travel back in time, you also travel into another dimension? So let's say you go back in time and kill you grandfather, the only thing that's different is that you won't be born... In that universe, you are still alive, but you're not from that universe. Oh and also, once you go back in time and to another dimension there's no going back to the one you came from.

4:44 I don’t feel so good..

In the kind of loop in this video ,assuming the same camera is used, you could and should determine that the camera would eventually run out of power,again assuming that the camera is not recharged in between cuts. If the camera is recharged at some point in the loop then you would have to deal with the fact the camera would brake at some point.

My theory on the grandfather paradox If you went back in time and killed your grandfather yes time would be changed drastically, but you would not be affected as you are now part of the time that your currently in, you will never be born, but you as yourself now would still exists as you currently are, age normally and live forever in the time your currently in. Almost exempting you from time itself.

Jake reminds me of a younger version of Bill Nye and actually talks about science a lot like him or he delivers his information a lot like Bill Nye if that makes any sense.

The way to beat the pre-destination paradox is to either remind yourself or leave a note telling you what to do exactly when to do it and why that way you still cause yourself to do it

The paradox is solved with this simple explanation: If you manage to go back in time and you kill your grandfather or your parent nothing will happen because you would be in a parallel universe. Every time you travel in time you will end up in a similar but different parallel universe, even if you come back your time you will be in a slightly different universe, that's why this paradox can't happen.

He's in a different world line EL PSY CONGROO

Here's a scenario: Lets say I walk into a room and find an apple on the table. Later, I go back in time and place the apple on the table where a found it, where, of course, my past self would find it. Okay, it's the bootstrap paradox, the apple went back in time to be itself, but here's the thing: apples are organic and will rot and decay eventually, and because the apple always goes back to be itself, it is never replaced so it continues to rot until there's nothing left of it to find on the table. So does the loop end? Then it isn't a loop, it's just a long process... I don't know, maybe some of you got an idea...

We need an infinite loop of this video.

Bill is so chilled and at home with Jake, I love it

If you could really achieve the grandfather paradox, you wouldn't just implode. You would just return to your time, and realize that now you never exist in this society. You would have no parents, because one of them is lost in time, and you have no identity. It would be very scary and still would make a great movie, but the ending wouldn't have you explode as soon as you kill your grandfather.

I'm no mathematician or scientist or physicist or anything that ends in cian or tist, and I'm lucky I can spell simple words without spellcheck, but I personally don't believe time exists. Time is a measurement, or so I understand it to be. No measurement itself is "real." I see a lot of examples of paradoxes concerning "time" travel, going backward or forward, but no one seems to address the progression of time after the time traveler leaves the "timeline." If I wanted to simply go forward from today, 1-29-15, and meet myself in the future, say 1-29-2025, I would have no "self" to meet because "I" left 1-29-15, and the "time" that passes between my going to the future and consequently arriving in the future does not contain my "self" within that timeline: I'm not participating in it. My girlfriend wakes up on the morning of 1-30-2015--after I have already left for the future, tries to call me, goes to my house, calls my friends and family asking where I might be. The mystery progresses into 3-24-2016, where everyone decides to stop posting missing person pictures on telephone poles. My face is removed from milk cartons. 1-28-2025, magic pills designed to make farts smell like Skittles is released to the public based on a recipe I wrote down once during college before passing out in the bathroom with no pants on and a bottle of So Co in my hand. It was the dying wish of my mother on 7-17-2021 that her only son be memorialized by helping the world smell a little less farty. How did she get my recipe? I have no idea because I WASN'T there during the unfolding of events because "time" went on without me. Those series of events continued without my involvement. For me to go forward in time and meet my future "self" would require that I exist in some sort of duality or even a multiplicaticitality.

A nice example is this- If you were to go back in time to prevent an Assassination then once you prevent it there would be no need to go back in time to stop the Assassination (As you already prevented it)

For anybody who hasn't seen 'Predestination,' I highly recommend that you do. It's about these very paradoxes.

3:26 MODEST MOUSE FAN DETECTED!

the quality of of vsauce videos now are just amazing, there the kind of videos i want to make sure i'm comfortable and the video quality is at its highest. :)

The boot strap sort of works with a Tv show called primeval because in the first episode first season where they find a camp and then in the second last episode they go back in time and create that camp.

I love his time travel videos they are so well produced

The grandfather paradox: I think that, if time traveling will ever work, time traveling works with different dimensions, so if you go back to kill your grandfather, it would have consequenses for yourself in THAT dimension and doesn't impact you in your own dimension

People aren't nearly excited enough that BILL NYE THE SCIENCE GUYS WAS IN THIS VIDEO!!

quite good and clever use of the "repeated ending" cliche. Er, I can't remember the exact name of the cliche, but it's something like that.

This just proves that Jake sees himself on a daily basis

This was so cleverly filmed, one of the best and most interesting Vsauce videos I've seen. Not to say that all Vsauce videos aren't interesting

This must be my favourite Vsauce3 video

4:44 idont feel so good mr stark

my head hurts, in a good way

Everything i say is a lie.

WHEN I STEPPED OUT into the bright sunlight from the darkness of the movie house, I had only two things on my mind: Paul Newmen and a ride home.

Film "The Jacket" has a very underrated paradox no one talks about it.

This video was very well done. Explains paradoxes in even a way the other common man can understand.

Bill Nye and Vsauce, this wins youtube!

I'm gonna use a little flash logic and propose that if, for example, you traveled back in time and prevented a major event from happening would you forget about all of it because technically it never happened? Or, considering time isn't linear, would you still remember what happened because you come from a different timeline and simply created an alternate universe in which said event(s) never happened?

Every single time I watch this I get amazed by everything about this video

Childhood Ruined: I looked up Bill Nye and he's actually called.... William Sanford.. Will San the Science Man

What's that guy called again? Nill Bye the Gcience Suy?