Is Time Travel Impossible?

[@SplendidFellow]

"We remain firmly in the grip of that one dimension we can never halt nor reverse itSPACE: TIME." Well done there, Matt.

[@Degantown]

Yes, truly epic application of the nominal titular catch phrase!

[@the.amazing.spatterman]

"… nor reverse itS PACE, TIME." I see what you did there.

[@DirkDanckaert]

A nice ending in a - for the rest - somewhat disappointing episode

[@pyramidacid]

It's Pace; Time. So good.

[@cheaterman49]

Came here to say that. Wasn't disappointed to see we're all on the same wavelength here :-)

[@MichaelHill-vw5sy]

Brilliant

[@MarceloDiCocco]

Late to the episode, late to write almost the same comment. ...Where is that time machine when I need it??

[@JohnSmith-ox3gy]

Shoppinglist: tachyons, exotic matter, custom universe, quantum relativity theory, blackholes, infinitely long tube and enough energy to rotate it.

[@booklover-hu9tw]

😂😂😂

[@Firmin38]

and on on sale :)

[@damontan4749]

And every item on that list is impossible to get. Just kidding, there’s always Costco

[@sadito_374]

Would you like those items be wrapped as a gift?

[@ksr3535]

Unavailable right now.Check back for availability!

[@daemonelectricity]

"I invite time travelers to join me on set." Immediately gets a text "Sorry bro, I can't do it today."

[@DennisMoore664]

"Busy with the dinos - I'll see you yesterday."

[@heru-deshet359]

I'm having a party for Time Travelers only. Please be there two weeks ago.

[@jorgepeterbarton]

Dude, we know about paradoxes. Ever since "the event" opened up entities from the chaos dimension and their electric proxy overlords we will certainly not create one again by appearing on your educational fax machine videos.

[@cotwodogger5812]

Immediately gets a text "Sorry bro, I can't do it today." "I invite time travelers to join me on set."

[@ZEMPHYRRIANs420gaming-bl7wm]

"Sorry bro, I can't do it today." "Then do it yesterday."

[@kylebowles9820]

"doomed to live consumed by regret in the eternal boring present" I love how inspirational science is 😍

[@joyce_rx]

Turns me on sometimes, ngl

[@donfields1234]

Actually IF WE MAKE IT TO THE PRESENT we find bliss for that is zen, few people manage that though. I consider myself incredibly lucky to have stumbled my way in. Basically in a day and a half i found myself in the state some monks/etc never reach in a lifetime of trying, then again that is part of the whole trick...i wasnt trying at all, i was only experiencing, accepting, witnessing, allowing...bla bla bla...all i can say is zen exists and it is far beyond any bliss the human mind can imagine AND its the absolute best experience a human can have, a concious step of evolution imho...happy hunting to all.

[@rezadaneshi]

There is always the fictional science aka miracle!

[@Wistful77]

No regrets. No fear.

[@onthelvl8291]

This trash isnt science...well psuedo science or straight science fiction yes indeed. Science...absolutely not

[@pateralus9]

"...its pace: time." Clever. Intelligence 100.

[@juk3b0x62]

You know Ted 2? Ted when his girlfriend brought a butterfly knife to court :"baby where did you hide that, they scan.... Oooooohhh! Me when watching the end of the episode : " hey, where is the beloved space ti.... Ooooooh"

[@lafaygts]

So begins the quest to fine cleaver ways to say space time at the end of each episode.

[@Mystixor]

I watched it twice to make sure I did not miss it and was left with sorrow until I read this.

[@konigstiger3252]

IQ 100 is average 🤦🏻‍♂️

[@edrumsense]

I was going to complain that it didn't ended in Space-Time... Thanks!

[@constantinvaldor1498]

What do we want? Time travel! When do we want it? Its irrelevant!

[@gamestarz2001]

5 seconds ago! What do we want? Time travel! When do we want it?

[@ZomB1986]

Okay, I'll give you time travel... in infinity years. Wait what? *insert universe implodes meme

[@Lennon766]

LOL

[@Ukitsu2]

Never gets old. No pun intended. No, really.

[@suhrdjoshi]

I smiled when he still managed to say 'spacetime' at the end of the video.

[@randomnamegbji]

I would like to see a movie about timetravelers trying and failing to get to Stephen hawking's party

[@bookslug2919]

a load of tachyons turned up but they were just passing through

[@codykyzer7064]

Or they did show up and instructed Hawking to say no one showed lest causality casualties...

[@jackthecommenter2768]

Thats not a bad idea

[@Qeyoseraph]

Do you know how expensive that trip was? I swear everyone assumes just because someone traveled time, they're going to be some rich person with super powers and gadgets. Where's the humilty in that?

[@bookslug2919]

@John Smith Touché

[@brainmind4070]

Is time travel possible? Well yes, but actually no.

[@IamRavara]

yesn't

[@michaelwood8479]

Yo

[@brainmind4070]

Michael Wood Nes

[@kzakaria91]

it depends

[@dmitrykuznetsov5492]

Well yes, but actually, Quantum Mechanics Forbids This

[@zuratu5743]

"Its pace, time." I'll allow it. *slowclap*

[@faaltoh]

Shiet, I thought "hey he didn't end with spacetime whats up with that?" Then read the comment section. Consider me bamboozled.

[@Patralgan]

*its

[@zuratu5743]

@@Patralgan Right you are, ol chap. Danke,

[@MelindaGreen]

Ug, I'm really sick of this trope and wish he'd give it up.

[@Patralgan]

@@MelindaGreen why? It's fun!

[@GdBearman]

How to be faster than light? Step 1: Record light traveling Step 2: Edit the video to be 2x faster Step 3: Profit!

[@chrisca]

If you create a video of light traveling and you put it in x2, you cannot see it faster than FTL since you need light to see it. So, if you see something or you see nothing, it wont be x2 LT anyways, creating the Schrodinger Travel. Where at the same time is and isnt.

[@chrisca]

I'll call the Nobel award comission myself

[@karnak333]

Your logic is sound.

[@absolute___zero]

@@chrisca time is just a coordinate, like a X, Y or Z coordinate in a traditional coordinate system. So, just like you can move in a 3D world,you could move in 4D world being the Time the fourth coordinate. Now, in our Universe you can't move the Time coordinate because it is being optimized by a cordinate descent algorithm (or any other similar) from an external source outside of our Universe. Since our Universe is being optimized at this moment you can't travel back in time. But since time is just another coordinate, like X,Y or Z, you would be able to travel back time when that external source that is optimizing our Universe decides to stop the process. It is like if I drop a rock into a big hole, it is going to move down, with no ability to return to the original point (i.e. what you call "travel back") on the Y coordinate because there is an external force pushing it down (the gravity)

[@timothyneiswander3151]

@@karnak333 Incorrect! It is light logic.

[@DarthMcLeod]

I believe it was Larry Niven who postulated that in a universe where time travel is possible, the only stable history that can occur is one where time travel is never invented...

[@billymcnomates7764]

Maybe like light they all cancel out and we are left with this.

[@hemenkalita6582]

Very nice......thanks.....

[@randomdude9135]

@@remley8877 So you like to live in a stable country like USA or a 3rd world unstable country?

[@Hallowed_Ground]

@SquidBag Lmaooo

[@timeistheworstthinginthewo169]

Fk him with his damned ' you can't go back in time ' theories.

[@mfpedraza]

Nice wordplay there at the end: "it(s pace) time"

[@Lyberoskylo]

I immediately ran to the comments to see if anyone would notice that there was no space-time ending sentence. Turns out I was wrong. Brilliant!

[@Orillion123456]

@@Lyberoskylo Don't be ridiculous. There is always space time in the ending sentence, even if he is on another show.

[@R3LF13]

Not the same thing. I found the ending strangely disconcerting. 😂

[@YouJustGotGerrowned]

You don't need an apostrophe when its/it's is possessive. It's = it is. Its = gender neutral possessive, like his and hers.

[@EvenTheDogAgrees]

@@Lyberoskylo Happened at least once before, that time there wasn't even wordplay to replace it. [EDIT] Found it, it was the one titled "what happened before the Big Bang".

[@anujarora0]

There was a young lady named Bright, Whose speed was far faster than light; She started one day In a relative way, And returned on the previous night

[@TheMaster5059]

Anuj Arora Bravo!

[@TheCarnivalguy]

I always liked that limerick. Seems I first read it 50 years ago. Thanks for posting it

[@Tokinjester]

@@TheCarnivalguy *passive aggressive* is never a good look

[@BJ52091]

To her friends said the Bright one in chatter "I have learned something new about matter: My speed was so great Much increased was my weight Yet I failed to become any fatter!"

[@BJ52091]

@Tech Stuf Bright was a young friend of Anuj's Who was one of those skeptical stooges He objected "How can it be That special relativity Has rendered your body fat Scrooges?" She gave Anuj a big grin And said "It's no paradoxical sin! Einstein has proved That while I had moved My weight loss had become a mass win!"

[@jolness1]

Love the futurama reference. “Roswell that Ends Well” is such a great episode.

[@Trias805]

The bartender says: What can I get you? A tachyon walks into a bar.

[@petermartin3260]

I tell this joke all the time; my favourite.

[@ericgraham8150]

Ok. I laughed.

[@markmoz]

Who's there? Knock knock.

[@andrewolivetreemixing]

I like how casually and quickly they drop the futurama reference

[@SuperVstech]

Yup. In the year 252525

[@SuperVstech]

Andrew Olive Tree Mixing plural... references...

[@Farb_dk]

That’s causality for you

[@ohtheforlanity3205]

Choke on that causality

[@harrypounds456]

@@SuperVstech humans are enslaved to giraffes

[@mjaerkens]

I tried getting on set but they wouldn't let me in. Also no one believed me when I said I came from the future, so take that pbs space dude.

[@Soupy_loopy]

I know, right.

[@paulmichaelfreedman8334]

Liar, you caused a commotion and got yourself thrown out. I watched from a distance.

[@EvenTheDogAgrees]

Try again. While you're distracting the guards, nobody will notice you sneaking in.

[@Humble_King_Ali]

Well if they were truly from the future they could repeat the day and get it right the second,third, fourth or even twelfth time.

[@EvenTheDogAgrees]

@@Humble_King_Ali Or just try a hundred times, overwhelm security Agent Smith style. :)

[@gprimr1]

I've always been a believer in the idea that you can't alter your own past, just create a new future that you can't experience. And backwards time travel may actually be limited to not until we can build wormholes.

[@someguy3766]

"It's pace: time." - epic ending. ;D

[@DCK-mh2en]

??

[@baishihua]

@@DCK-mh2en it(s pace:time)

[@someguy3766]

@@DCK-mh2en He always ends the episode with 'spacetime' - but this time he snuck it in with 'It's pace: time'.

[@Shakads]

I'm gonna do my grammar nazi for once but, it's "its pace : time"

[@mmhmmindeed]

I almost missed it. So dry. So funny.

[@ShannonMcDowell71]

Interesting but time travel was finally determined to be impossible way back in 2271.

[@jonashansen2512]

Was it really tho? i recall the council just vetoed it to be so. U know, for the general public best interest.

[@stefanhermansen8975]

@@jonashansen2512 that was a few hundred years or so later iirc, when people got fed up of being put in prison for crimes they hadn't even considered yet.

[@Winged_Snek]

@@stefanhermansen8975 damn

[@Kusanagi13]

Shannon McDowell ad or bc

[@shrimpflea]

I use the Hebrew calendar so that was a really long time ago.

[@guyfrostdesire]

0:12 That just proves KZbin won't survive into the distant future.

[@mikicerise6250]

Should have tried posting it on Twitch. ;)

[@tarqinquentinsson-obviousl957]

or that he just didn't ultimately post the address..

[@panvomacka9079]

@@tarqinquentinsson-obviousl957 Also, shouldn't he wait for 1 year? Or maybe i didn't understand him correctly. Or maybe i'm dumb and don't get it :-D

[@guywhodoesstuff1798]

or it just proves he never released the address

[@mrmister1657]

Guy Frost they still fluke go back in time and see KZbin even if it’s not around

[@lilmoris1]

Other people: If I could time travel I would fix my life! Me: Go with your crew, Noble 6. I'll buy the Pillar of Autum some time!

[@garywill6340]

I showed up at the studio, you know through time travel, and they told me to go away. Thanks Matt. Next time, let the staff know to expect time travelers. 😒

[@sofaandbread7539]

This is my favorite channel in where I understand nothing.

[@andersjjensen]

The funny thing is, this is the only channel that makes it super interesting to not have a frigging clue about what is going on :P

[@sofaandbread7539]

@@andersjjensen Definitely :)

[@Xeno_Bardock]

Check ThunderboltsProject channel. Only then we start to understand everything slowly.

[@EmmaDilemma039]

You can tell that when people are raging and tantruming about a PBS space time video, it's because they didn't understand the content and that makes them so mad XD

[@kamranbegakafr3ak]

Same I like this channel and topics but 90% thing just go over my head

[@michaelchigano6126]

Time travelers probly siting back looking at this and laughing lmao

[@DJHise]

Leave late on July 18th, 2043. Dog on freeway.

[@Qwerrty]

i think so too :P

[@cornflarkes399]

Yeah

[@fuzzywzhe]

It isn't possible. Think about it, if you send a lump of lead back into the past by 1 hour, you have just violate the law of conservation of matter, and hence, energy.

[@fionajones7908]

fuzzywzhe 🙆🏿‍♀️

[@AreaofInterestTV]

Anyone watching in 2033?

[@Backwoods_Adventures]

Hold up

[@planexshifter]

Yesterday?

[@jorgepeterbarton]

What about "the event"?. Be careful, the entities can track your connection.

[@estudiordl]

Of course, after all, what else we can do while we wait the covid pandemic ends... 😏

[@maketzu5966]

@@estudiordl yea just wait until they find out about the giraffes

[@stevengreen3873]

The Futurama reference made me so happy 😂

[@SuperVstech]

Steven Green references...

[@billnyfeler]

13 minutes to describe many different ways we can't travel back in time.

[@timeistheworstthinginthewo169]

Can't my ass, it's not impossible plus fk everyone who says that you can't go back in time.

[@jayschwartz3203]

Even if we did go backwards in time,it would still look like we are going forward.

[@GoldenSaddle]

It’s actually possible Just get a Flux Capacitor, 1.21 Gigawatts and get up to 88 Miles per hour.

[@hudsonbruce898]

Golden Saddle bruh I know these people are mental they just need exactly this.

[@geoffreybrunell5592]

Don't forget a car made of stainless steel!

[@lairdriver]

Even if it worked..you'd die coming out the other end. Your car is doing 88mph into the future. We have no idea what's in front of you. Chances are you come out of a black hole while doing 90 into a Grocery store and dying..and creating a paradox from it

[@geoffreybrunell5592]

@@lairdriver How would you create a paradox if you're going into the future, not the past?

[@elsauce4873]

Or you can just initiate a temporal vortex or a sub-space fracture. I mean it works on Star-Trek so it works in real life, right?

[@yuletide1281]

Time travel is possible just go to the other side of earth you’ll either be ahead or behind depending where you started

[@damontan4749]

Hope you are joking, if not you might be one of the biggest dumbfucks on earth

[@detailsubset]

@@damontan4749 somebody in this thread is at least

[@alyx1a]

@@damontan4749 hes making a joke about time zones

[@sabahmaryam8988]

Thats still place travelling

[@Godz3839]

ooh that was a good ending "...nor avert its pace: time"

[@edrumsense]

I was going to complain that it didn't ended in Space-Time... Thanks!

[@zes3813]

wr

[@Godz3839]

such a wild phenomena where people agree with the word I used yet now I think it's wrong. I'm pretty sure it's "reverse" 🤷🏼 vocabulary exposure if nothing else

[@craigcorson3036]

It IS "reverse". Watch again with the CC on.

[@Godz3839]

@@craigcorson3036 oh yeah, I always forget that's an option. thanks man

[@MrRofl131]

We just traveled 13 minutes forward in time.

[@BlatentlyFakeName]

Im from 8 hours in the future

[@nameremoved4010]

@@BlatentlyFakeName I am from the day after yesterday going to future.

[@kudojay1840]

Im from tomorrow

[@kennethhicks2113]

Unless watched from ISS ; )

[@AspenEmrys]

I watched it on the train, so a little bit further... relatively speaking

[@PillowKing]

Im a time-traveler. You forgot to post the address.

[@AMan-xz7tx]

I’m a time traveler, I didn’t even know about this event cause who tf out here attending empty parties? ...wait, was it empty BECAUSE everyone knew it was empty? So no one showed up because of the very fact that no one showed up before! Take that, Hawking!

[@Monte80]

@@AMan-xz7tx I'm not coming.

[@paulmichaelfreedman8334]

@@AMan-xz7tx I would have liked to have been a time traveler, I am fully planning to make a time machine and attend Hawking's party, JUST TO MEET HIM! ...but alas, I never will succeed, because I wasn't there. Unless the time cops stop me.

[@zhane6816]

No one showed because humans won't live long enough to find out forsure. Climate change killing humanity out in another 30ish years.

[@Raxiel497]

@@AMan-xz7tx I was going to go, but someone moved the solar system and by the time I caught up I wasn't just fashionably late, but late late, so I went outside to experience what it was like when we still had a sky instead.

[@mboehmer]

Question: Wouldn't a Tachyon traveling from A to B backwards in time look exactly like an Antitachyon traveling from B to A forwards in time? How could we possibly know its a Tachyon traveling backwards? Plus: Could we even "sense" the imaginary part of the mass? Like, what would the imaginary arm of a scale look like?

[@judethedude7704]

No bro if the energy desipated is more that what is needed for the speed of light then we will travel only backwards in time because at the speed of light every time stops that is what is happening Hope you understood everyone should give answers to every qs which you think you would know it would be of help not for this qs but other once I am just 17 so it could be wrong too

[@melgross]

@@judethedude7704 well since you’re seventeen, it’s nice you’re interested. But some advice. Most people don’t like being called bro.

[@judethedude7704]

@@melgross oh i see so dosnt that mean i should have added 17yrs

[@robertmontero417]

They measure mass with magnets not scales. So yes you cannot see the magnetic force used to measure. They measure using the disruption in the magnetic field

[@joeybru]

Hm, I guess timelike curves stay timelike from all observers (under Lorenz transforms), so that antitachion going B=>A would still go faster than light. I dont think many ppl know how to measure mass of i kg its just that the equations in question allow that. But newtons eqn for gravity allow it too...

[@ThorneStarr]

Alright, here's my thoughts about the whole subject and some stuff I find is not fully thought out in this video. It's known that moving near the speed of light, causes time to slow for the thing moving at those speeds and, as stated at the beginning of the video, that thing would miss out on thousands of years experienced by the rest of the universe. Then goes one to say that moving faster than light would allow you to basically turn back time for the rest of the universe? These two statements are contradictory to each other, as you can't have a local effect spontaneously turn into a global effect without changing the fundamental way that the universe itself is acting. If moving an object near or at the speed of light causes a slowing of time for the object itself, if you wanted to reverse time for the universe, it would mean you would have to move the entire universe at a fast enough speed to have it move backwards in time while you sit in an isolated bubble of space-time which is not moving at all. And this applies to the later arguments about wormholes as well. You can't move one end of a wormhole at near light speed and have it come out in the past, because time is only being affected in the local area around the end of the wormhole, not the entire universe. This is something that always bothers me when people talk about time travel via FTL travel and it just doesn't make any sense why people keep going back to thinking that moving a single object faster than light would cause the rest of the universes space-time to reverse. The math only tells that the object itself experiences the temporal effects, not the rest of the universe. --- And now for some time travel loops and paradox theories. The reasons I believe that we don't see time travelers, is because actually traveling back in time causes the timeline itself to branch. So the person traveling backwards in time, will never end up in the same timeline they started in. This allows for seemingly paradoxical events to not utterly destroy the universe. Time loops are, as stated in the video, events that are always meant to happen in the first place. And, to be perfectly honest, why would anyone ever want to travel back to our current era anyway. It's full of war, poverty, disease, etc... It doesn't make much sense to even think about coming back to this time period. So yeah, that's what I wanted to say on the subject.

[@larrybroeker403]

it takes an infinite amount of energy to move an object with mass at the speed of light.

[@CrownRock1]

Another paradox: If you moved in to the past on the same timeline, your time machine (which I'm picturing as a sort of box, car, phone booth, or whatever) would presumably contain a certain amount of EM radiation inside, the same as the ambient radiation outside of the box the exists all around us. You would inevitably carry some of that radiation with you to the past, raising the ambient levels of radiation there. In a single iteration, it would be a negligible amount, not even measurable. But unless you bring it to a location in time-space that is distant enough (either far enough in 3D space or far enough in the past) for that radiation to be absorbed 100%, you will create an infinite feedback loop.

[@miguelcasanovamorera1729]

I thought the same for a while, but I realized didn't understood special relativity. The name comes from the fact that speed is relative, there is nothing standing still and there is not a real velocity to have, you only can know the speed of the rest of the universe respect to you (relativity). Once that is understood it's easy to see that time don't slows down because your speed, because there is no real velocity. Actually, the people on the ship that goes almost at speed of light respect to earth will see us with slow time, as we see them, because they can consider that they are still and we are moving (reference systems must be equal (relativity)). The cause of the time difference is caused by the "turn", they are traveling different "space-time lines" and there are time adjustments when one or another do turn to reunite again. This is a nice video to understand what I told: kzbin.info/www/bejne/Zpqti5KHfLJ_epI About of going to the past, in this space-time relativity describes, if you go faster than light your "space-time line" goes to the past, you don't change the universe, but the universe allows you to go back.

[@shaunhumphreys6714]

please read my reply to this video at the top where i go into detail on this.But going backwards and time travel are two different things. what you are talking about is reversing the entropy of the universe so you and the universe would go back to an earlier date. this is entirely different to time travelling back to a moment in time. and these moments are saved in the universe-based on the block universe model-where every moment in space and time exists in that block universe on a grand information scale. GR and SR provide no practical time travel solutions e.g. too large energy requirements or negative energy or superluminal speeds. so forget SR and GR and do it via quantum mechanics and information theory. i have been working on this theoretically and practically. please read m comment on this video at the top in which i state how this can be done. i state the same as you that time travel itself causes the creation of a parallel universe copy of the targeted date e.g. in the past, so the time traveler will decohere into a brand new universal branch, almost identical to ours, on our date but we will never see them, even though they are based on quantum formalism-right next to us. getting to our particular branch would be technically possible but a astronomically difficult engineering and mathematical feat given the infinite number of decohering branches to navigate which would require some insane quantum super computer to map them because they are decohering into new branches all the time. even while a time traveler is trying to get to our branch, they are no longer even in the branch they were in when they started the calculations. so doable for an advanced civilisation in hundreds of thousands or millions o years, but then the probability of them choosing our particular branch out of the trillions of branches that exist would be so unlikely as to be ridiculous. after all there are infinite branches and so many like ours are identical to all the others except for minute quantum differences. i cant think of a reason why a time traveler via many worlds would choose our particular branch therefore the time traveler invite is preposterous and does not in any way disprove time travel. Rather it proves that the person who set up the time traveller invite, has an amateurish understanding of temporal mechanics and quantum formalism.

[@shaunhumphreys6714]

this is my comment on the video from the top, that i mentioned. decided to copy it here as it was never replied to anyway and it goes into more detail. with hugh everitt's many world's when applied to backwards time travel it is important to note that the very act of time travel or even retrocausal type quantum tabletop measurements will cause the creation of a parallel universe copy of the present with the altered past, or a parallel universe copy of that new past.so if soone time travels from ten thousand years in our future to this date right here, they won't appear where we are. they will appear in a parallel universe copy of this date now. that is why time travelers do not appear when we ask them to. in fact a time traveler also by the many worlds version will always by the event of time travel, travel to a BRAND NEW parallel universe copy of the date they target with their time travel. although it is technically possible for them to then find their way to our particular branch, given the sheer infinite number of these parallel universe branches that are decohering all the time, and given the time travel creates and enters a brand new branch when they time travel, the probability of a time traveler ending up here is so unlikely as to be utterly realistic. that is unless they purposely undertake the mathematical nightmare of sifting through the infinite numbers of all that web of universal branches in order to find our one. and why would a time traveler from another parallel branch even be trying to get to our branch?? because our branch will just look like all the other infinite numbers of branches. nothing special and almost identical, sometimes only differing by minute quantum measurements. and as said, if someone from our branch, in the future time travels, to this date, they will end up arriving in a different brand new parallel universe branch. so asking a time traveler from the future to come here on a specific date is a completely ridiculous test which would require even advansed time travelling civilisations in the future an enormous mathematical and engineering nightmare to map all the infinite parallel universe branches decohering, in order to find our one. that is basically harder than finding a needle in an infinite number of haysticks. If an experimenter time travels one hundred years back in time, they will rotate or decohere into a new parallel universe copy of that target year in the past. and as that is a new 'timeline' a new branch, nothing the time traveler does there will affect the original branch they came from. It would even be possible to return to the branch they came from, but that would be a mathematical engineering nightmare given that we are decohering into new parallel universe branches probably all the time, with an infinite or near infinite number of them. so time travel to the past using this method would involve pure quantum mechanic not SR or GR. Any quantum measurement that involves a retrocausal effect e.g post selection where say a photons past is altered is generating a brand new parallel universe copy of the present with a new altered past. Containing this quantummeasurement subjecting it to a probability function and a Aharanov type quantum trigger to produce a macroscopic effect. and you can travel back in time. I just haven't figured out how to target specific dates in the past. And this quantum physics method via retrocausal measurements and via hugh everitt many worlds is back in time only. not forwards.the time travel event woul not even be travel but would be instantaneous and no different to how decoherence is happening all the time. This is the only practical time travel solution as all the others require negative energy, or are based on closed timelike loops which are useless for the kind of time travel we want e.g. to go far back in time. The only one that works out of the big stellar ones, is the wormholes. But it's the negative energy problem to keep them open. so the quantum mechanics solution via many worlds-parallel universe copies of the past is the only practical solution, plus it would cost hundreds of thousands to do, whereas the others have unfeasible energy requirements and are for the far future when human civilisation has advanced more-if humans are still around in a trillion years there is no doubt in my mind that they will be able to even alter the universal constants if they wanted to, changes the values of the higgs fields, slow down the expansion of the universe, reverse heat death, almost anything will be possible for them. and time travel forwards and back will be a normal process for them.though possibly controlled so the knowledge and means are only in the hands of the powerful few. ..

[@tubbysza]

Just when humans are about to make a massive full scale experiment on time travel, that is when someone from the future goes back in time and says its a big mistake.

[@AutismIsUnstoppable]

That would create a paradox where time travel never exists so nobody knows its bad and there's no time machine to go back and tell the people not to build their time machine so they will invent the time machine

[@Mileswayv]

Autism Is Unstoppable underrated comment

[@sozetsukokai9327]

@@AutismIsUnstoppable that's the same principle as the grandfather paradox. If you go back in time to kill your grandpa, then you are never born, resulting in you NOT going back to kill your grandpa, which results in you being born and so forth. Rather than a loop, it's more like two timelines wrapping around each other weirdly.

[@user-pp8ru6uu1s]

@@AutismIsUnstoppable Well, a fix to that would be that two realities exist at the same time, one where nobody does time travel and one where they do. Or by time traveling to tell people that time travel is bad, you don’t prevent time travel in your timeline but rather, you create another reality where it doesn’t happen. Or it’s not really a paradox and we think it is. You can check out Minutephysic’s video on KZbin on the solution to the grandfather paradox. MinutePhysics does a way better job of explaining what I did.

[@timeistheworstthinginthewo169]

@@user-pp8ru6uu1s What about to reverse the arrow of time instead. We could go back and do over that way and we won't deal with that fking paradox.

[@LordSlag]

"Let's review General Relativity quickly...."

[@TCUsouthpaw]

LordSlag ... then dabble in the light math behind black holes

[@TheSwordofra]

Yeah, then after that we can do a little light refresher of the trajectories of null and timelike geodesics in different wormhole geometries...

[@ChrisBrown-pw2lb]

@@TheSwordofra Yeah. What this guy said.

[@based8223]

@TheSwordofra nice google search.

[@TheOtherSteel]

12:17 "We seemed doomed to time travel only forward and very slowly at that." I was under the distinct impression that we baryonic beings traveled very quickly through time and only greatly increasing our spatial velocity slowed the velocity through time.

[@claquos23]

What about this paradox then: if I go back in time before I was born, what happens to my body matter? It already existed at the time but was elsewhere. Can the same matter or molecules be at different places at the same time?

[@AZ-bm3ki]

It's a good point. It seems to violate the law of energy conservation. As soon as you go back in time, there is more energy/mass in the Universe violating the 1st law of thermodynamics.

[@connorschultz380]

@@AZ-bm3ki no, he's entered from outside of the system of the universe, that law only applies to a closed system, the system of both the past and present universe would still have equal energy.

[@0MujaKina0]

Conspiracy theory: Yes! Kinda!

[@dazzle5350]

Multiverse? 🤔

[@0MujaKina0]

@@dazzle5350 Ooh that is another story!🤔

[@GagerTube]

First, they will discover D mails and only then will there be a time leaping device that overwrites your past self memories to your current ones. But first you need a IBN-5100

[@someguy7703]

And hack into cern's database and stuff.

[@sayjiantoru5409]

Tutturu

[@LordOfTheWhores]

What a mad scientist

[@decision245]

Steins gate:)

[@alexp5569]

We also need someone with *_[READING STEINER]_*

[@cFBlackface]

i think if you smart enough to time travel, you are smart enough to not let people to know you time traveled.

[@IAmNumber4000]

Lol. I love that Futurama technically solved the Grandfather paradox.

[@jaredgarbo3679]

How did they?

[@Alovon]

@@jaredgarbo3679 If I recall correctly, they went with a semi-predestination variant of Time Travel. Aka, if you time travel, you yourself were always involved in the events in the past. That is a Predestination variant. The Semi-Predestination variant is that it pretty much you are altering the past, but the alterations result in the same outcome of you traveling back in time to complete the goal you were time traveling in the first place to do, so to an external observer all future time variants are the same. Aka, Timeline 1 is no time travel, but becomes timeline 2 with time-travel predestination after the time traveler time travels.

[@CcatVideogames]

@@jaredgarbo3679 Fry became his own Grandpa

[@charliek9394]

@@jaredgarbo3679 He did the nasty in the pasty.

[@kvancaksoylu6736]

1:42 "Actuallly, the meth does sort of allow that"

[@stevelenores5637]

Is that what you on when responded?

[@dAvrilthebear]

I've heard this too

[@ValenteRAPiaui]

Meth allows you to do a lot. Travel to the past? Maybe, who knows?

[@mirkohille8188]

#hedidthemeth

[@ChrisBrown-pw2lb]

Meth? METH! Did somebody say Meth?

[@stevenarmstrong2598]

Sunday November 3rd 2019 I will be time traveling back 1 hour. I time travel twice a year. Once forward in time and once to the past. I have done this every year for 37 years.

[@paulmichaelfreedman8334]

Correction, * nearly * 37 years ;) Statement only valid until 11-3-2019. Batteries not included.

[@stevenarmstrong2598]

No you stand corrected. For 37 years. As of Spring 2020 it will be 38. Do not mess with powers, that of which you do not understand; such as: simple math.

[@hemeoncn]

Well Steven if you live in the United States then I am in your future and can tell you what will happen in the future as I live in the Atlantic Time Zone which is either 1, 2, or 3 hours in your future.

[@Rebasepoiss]

I'm travelling back in time already this Sunday, aha!

[@acetate909]

They didn't even mention the flux capacitor.

[@Vitringur]

Let's say there is an old tale about a guy a couple of millennia ago that disproved time travel because of a party. You have the capability to time travel but you have no idea what time it was, where it was held, you don't speak the language, you don't know the customs, you aren't sure what resources you might need. I mean, if I'm in the year 5000 and have a time machine I'm definitely not just going back to the 20th century of all times just on a whim because some obscure annals say that there was a philosopher back then that held a party nobody came to.

[@user-pp8ru6uu1s]

Or, time travel is possible but we never find out how to do it so you never go back in time. Or by going back in time and changing and event, your reality becomes an identical reality to an alternate reality where the event you changed never happened. Or by going back in time and changing an event, your timeline and an alternate timeline merely swap identities. But these are all what if’s and speculation because we don’t know if time travel is possible or not but with the absence of evidence for it, scientist conclude that it’s more than likely not possible.

[@erictaylor5462]

Of course time travel is possible. I've been travelling through time my entire life. I was in the 70's once. Hell, I was even in the 60's for a day and a half, but like many people who were there, I don't remember the 60's.

[@nataliebarrett985]

Eric Taylor haha real-time traveler 😂 happy 50th for the 30/12/19 🥳👍

[@erictaylor5462]

@@nataliebarrett985 Thank you. Do you know that in the US "Pi day" is March 14th (3/14) but in England Pi day is the 22 July (22/7). Funny how the US and England disagree on so much.

[@SammcMillan69]

Did you travel to future too? Are you still time traveling?

[@erictaylor5462]

@@SammcMillan69 I have only been traveling one way, from the past to the future, well from the past to the present. and yes, I am still traveling. In fact, I have come from the past to answer your question in what is your future (when you ask this question).

[@SammcMillan69]

Well does that mean you haven't travelled to 2020 and beyond? Can you go to 2012 and warn me of the monster of my life exactly on July 20?

[@Hykje]

I believed time travel was impossible but 10 years from now I changed my mind.

[@MusicalRaichu]

Holding events inviting future time travellers assumes that time travel, if ever developed, can be carried out freely. Aeroplanes allow us to travel anywhere on the surface of the earth, but they need infrastructure, i.e., a landing strip, and there are limits imposed by fuel capacity and weather. Maybe future time travellers will need devices installed anywhere they want to land, so time travel to before the technology was invented isn't possible.

[@innsj6369]

Airplanes! Come to my house!

[@paulmichaelfreedman8334]

So they developed the time machine before the landing pads. That's stupid.

[@SalisburyKarateClub]

Somebody's been reading Isaac Asimov

[@JesseTheGameDev]

Yes, exactly. This.

[@someguy3766]

I remember watching a documentary about a time machine that could use lasers to send a message back in time - however, the link between the past and present would only exist between the points that the message had been sent and when the machine was first switched on for reasons that I cannot remember but were grounded in understood physics from what I can recall. So yeah, this theoretically is a limitation.

[@wayneyadams]

0:19 His invitation to time travelers reminds of the episode of Big Bang Theory when Leonard was signing the rental agreement with the clause that said if either of them discovered time travel they would travel back to a few seconds after Leonard signed the clause. They turned around waited a few seconds, and together went "aww." On the other hand, maybe time travelers either didn't see his video or don't want to reveal themselves to us.

[@Tantalus010]

Yeah, but all time travelers forever? That's where the catch comes in. IF time travel were ever invented, it would certainly be misused eventually, as all technology is. So, even if there were laws saying "don't let past people find out time travel eventually exists," someone would have shown up if for no other reason than to thumb their noses at the law.

[@peterjacobsen7613]

Sorry, I was going to visit you on set, but my kids were fighting so I had to turn the time machine around.

[@michaelsommers2356]

No problem. Just wait until the kids are asleep and try again.

[@bobcoughlan929]

I hate it when they keep asking ‘are we then yet, Dad, are we then yet, Dad?!?’

[@sandeepsrinivas7]

*Reverse Flash:* Did someone say *Tachyons* ? *Helicopter noises intensifies.*

[@talhahtaco2035]

*My goals are beyond your understanding*

[@logicplague]

Flash was so good in season 1, they really blew their load too soon with Thawne.

[@canyadigit6274]

Sandeep Srinivas you’ve always been like a son to me

[@Vares65]

Data can fix anything with an inverse Tachyon pulse.

[@rays5163]

Hell yeah I'm feeling it

[@sandeepsrinivas7]

*Bartender:* Go home. We don't serve to faster than light particles here. *A Tachyon walks into a bar.*

[@Yora21]

A blind man walks into a bar.

[@OgLockpin]

I got that just before I saw it.

[@Veelaru]

Today at 8:00 A.M., I decided to time-travel to 2:00 P.M. Although the journey took me 6 hours, I succeeded. So, guys, time-travelling is a real thing, yo.

[@LivinBilly]

I tried to do the same thing on my vacation but messed it up... Stupid time-zones!!!

[@troyhenry6111]

I was always curious if the math of a torus could be substituted for the infinitely long cylinder

[@dhayes5143]

:o Let's all pool our money and make a neutron torus. That should be dense enough.

[@mvmlego1212]

I don't think so, in most cases, because a wave that propagates through an infinitely long cylinder won't interfere with itself the same way that a wave propagating through a torus will.

[@troyhenry6111]

@@mvmlego1212 i was thinking of the cases where you could set the distance so the waves would amplify each other

[@Floraine_UK]

aint some black holes in theory are in the form of a torus. maybe those are working alien wormholes? ^^

[@TheNasaDude]

Since the cylinder needs to rotate on its axis, you can't substitute it with a torus

[@TKO593]

Yep; I did the nasty in the past-y. -Fry

[@primovid]

and so did your grandpa

[@melllvar4262]

And that past-nastification is the problem.

[@TKO593]

Melllvar It was the solution against the big brains 🧠

[@andrewlong9179]

I'm receiving a tachyon message that says you forgot to post the address.

[@motro1301]

Wait...are you elon musks relative?

[@andrewlong9179]

@@motro1301 Yes, actually! I'm his great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great grandson. ... I've said too much.

[@thatautogarage3644]

Futurama is my favorite show of all times and made me excited to here you reference Fry’s self creation 🤣

[@kenmapp4891]

if you were in one of the space time loops described in the episode, when you returned to the starting point, would you remember that you had been there before? if yes, then how is it that the matter and energy that make up your memories are exempt from the time loop?

[@FluxTunableTransmon]

..., nor halt itS PACE: TIME Well played

[@gribben3]

"Like Fry!" YES!! 😅

[@alexandernichols413]

gribben3 Nasty in the pasty 🤔🤢🤮

[@emanuel5944]

Alexander Nichols Wtf lol

[@ynntari2775]

"the universe will allow time travel but only when it doesn't create a paradox", also known as "the universe will allow time travels that will make we study them until we find out that no break of causality is actually paradoxical according to physics, only according to our old emotional common-sense"

[@thingsiplay]

it's pace: time GENIUS

[@RetroGameSpacko]

i like your profile ^^

[@Karcsi111]

Damn, I didn't get it. I thought I will find rage comments about the missing spacetime.

[@thingsiplay]

@@RetroGameSpacko Haha, yours not bad too. ;-)

[@phrenetic6254]

Everytime a time traveler is detected, they travel back further in time to prevent being detected. So our history is constantly being altered by careless time travelers. That's why we sometimes wait for our buddy to come back from the restroom or kitchen at a party while they take annoyingly long, just to find that actually no one is missing in the first place.

[@PaulMeranda]

lol, i like how all you have to say is "Like Fry!" to take us back to the Roswell episode of Futurama. interesting how much pop culture has taught us about theoretical physics without some of us even realizing.

[@ToeCutter454]

with everything that the Simpsons(creators of Futurama) have predicted throughout the last 30 years or so, i'm willing to bet that someone there has a time machine!

[@craigcorson3036]

Unfortunately, almost everything that pop culture has taught us is laughably wrong.

[@morebakeder]

Hermes: "so were is the device that speeds up and slows down the passage of time" Fry: "behind the back seat" (pulls out a bong)

[@nostalgia63]

Nice video. Philochrony is the theory that describes the nature of time and demonstrates its existence. Time is magnitive: objective, Imperceptible (intervals) and measurable.

[@darioinfini]

Time travel is not possible where it causes paradoxes because "the universe has to always make sense". I submit to you that the current political and cultural reality disproves this statement.

[@nofanealbni]

What about travelling forward in time to a ridiculous magnitude, to where the universe randomly reconfigures itself to a past state?

[@Jowannabe]

Haha they did that in Futurama. The universe ended up being a cycle. After certain amount of time there is the end of the universe and then after that there is another big bang. I think that's also how Dark series works. The apocalypse must happen.

[@KSignalEingang]

@@Jowannabe this is also the plot of the game "Spaceplan" only there are more potatoes involved. Like, a lot more.

[@someguy3766]

Still counts dude, still counts. Welcome to the Awesome Exclusive Club for Awesome Time Travellers. ;)

[@Radonatos]

Or travelling far enough in an assumed infinite universe where the local space is configured exactly like ten years back.

[@Shaner9er]

Soo with interstellar Cooper never really went back in time he just kept going forward staying within his timeline but within the black holes singularity he was able to see time as a physical he could interact with but not much else.

[@Bitchslapper316]

He wasn't in the black hole when he was communicating back in time, he was in the wormhole. Which in this video he says that a wormhole could be a possible means of time travel.

[@Shaner9er]

@@Bitchslapper316 so you're saying that the black hole he went into was just a wormhole the entire time?

[@Bitchslapper316]

@@Shaner9er Not exactly. TARS said something along the lines of "they saved us, they created this 3 dimensional space within their 4 dimensional space". The signals that NASA picked up and later the ones that Cooper and Murph noticed came directly from the wormhole, those signals were sent by Cooper at the end of the film. The way I have always looked at it is that he was moved from the black hole eccertion disk into the 4 dimensional space where the aliens lived which was shown to be that wormhole, he then used it to send the imformation back in time.

[@bluntheadass6863]

@@Bitchslapper316 probably the best Sifi movie ever

[@fredland1002]

So, that's why we can't find antimatter, it travels backward in time from the beginning of time because it has negative mass.

[@Congruesome]

Opposite charge. Not negative mass. Dark matter or dark energy is more like negative mass. I think. But what do I lnow? I work at Der Weinershnitzel.

[@Ganerrr]

My idea for how time travel doesn't break is similar to one mentioned, basically whenever you time travel whatever happens needs to (via quantum randomness essentially forcing it) end with a state of you still going back in time. Ex. go back in time and kill your grandfather, you just happen to get born to someone else at random (which also implies that the likelyhood you succeed at your task will be as difficult as some alternative is likely, which would make for a good movie). So really you could mess with anything and you could completely change the circumstances just with the caveat you end up still going back in time to do it with the same "appeared" circumstances (ex. when you return it needs to appear as if you did nothing, but all that matters is that being true to your perception, so you could return then take off some VR headset that now was responsable for your life experence up to that point).

[@MrEmoImo]

Whenever you hear the word Tachyon in Star Trek, you know the episode is going to be about time travel.

[@hydrolito]

Tachyon particles were used to keep track of the Romulans using their cloaking device. Of course time goes by in every episode about 45 minutes plus commercials if on Vhs or dvd, they put commercials at beginning and possibly end.

[@AngDavies]

I love the quantum mechanics resolution to this the best: Something like you are a superposition of killing your grandfather, and not killing your grandfather, by going back In Time and killing your grandfather, the "not killing your grandfather" part becomes a "killing your grandfather" part, but the "killing your grandfather" part becomes impossible, as now you no longer exist, so it becomes a "not killing your grandfather" part and the two parts change places, but thereby remain the same total state and continuity is preserved. It's so unhelpful and mind ending hilarious XD

[@timothyneiswander3151]

If you have a time machine it had better be a space ship as well. As soon as you jump in time, the Earth will leave you behind since it is in constant motion through the universe. So you better leave enough time to catch the Earth at its new location.

[@danielhenderson7050]

I was like " did he just not say Space Time at the end??" Check comments... Oh ya..

[@gatorslife22]

That moment you realize that the cause for the expansion of the universe is actually negative matter outside of our observable universe 😉

[@tafelsmith7014]

Negative matter outside our universe would rather force our universe to contract than expand, while possibly expanding or contracting itself. The gravitonal force coz of negative matter is away from the negative mass

[@grokeffer6226]

I've thought this same thing.

[@gatorslife22]

@@tafelsmith7014 idk, I was thinking negative matter would ATTRACT matter to itself 😅

[@tafelsmith7014]

Matter attracts matter coz when u use the gravitational vector formula u get the direction towards the object applying the gravitational force, but when u use a matter and negative matter, the product of m1Xm2 becomes negative so net force is now in opposite direction hence away from the negative mass that is applying the gravitational force on the regular matter, hence repelling it. kzbin.info/www/bejne/Z2GkgWqqntRnZpo An episode to have a better understanding.

[@Iki-Jotuni]

Why do all time travellers first think of killing their parents

[@pansepot1490]

Because they are too coward to commit suicide directly.

[@TheGeekyHippie]

I figured they would always go for Hitler first

[@billmalcolm4291]

Least painful method of suicide?

[@olivianeugeboren602]

I was looking to see if anyone named john titor was in the comments and then I immediately saw "JT" and got shook

[@billmalcolm4291]

@@olivianeugeboren602 Whang had an episode about that. The guy who claimed to be him apparently came forward admitting it was a hoax

[@Thomas_Claro]

You missed the most plausible non-paradoxical theory as described in Primer; the time traveller Overwrites the present/future of a single timeline

[@jw7672]

I was going to tell a joke about time travel but nobody laughed

[@loversneedy2824]

Sleep in 2019 11:59 wake up at 2020 12:00 CONGRATULATIONS YOU TIME TRAVELLED A YEAR

[@peterbarratt8699]

Nope, just moved forward 1 minute. ( ::> )

[@RoseTheRoyal]

r/woooosh

[@globaldigitaldirectsubsidi4493]

"Common sense is nothing more than a deposit of prejudices laid down in the mind before age 18." Albert Einstein

[@SuviTuuliAllan]

hahahahahahahahahahahahahahahahahahahahahahahahahoooooo

[@Congruesome]

I didn’t believe in time travel, until I picked up an oddly familiar hitchhiker after flipping a coin. (and, full disclosure, I had kicked an old Gypsy woman in the crotch earlier the same day, and I had accidentally dropped my false teeth into some machinery while attacking a pidgeon that flew in with a broom at my janitor job at the particle-accelerator.) The hitchhiker urged me not to board an upcoming flight I had booked to a Janitorial Conference in Zurich later that month. I followed his advice, The flight disappeared in the Bermuda Triangle, only to reappear a year later in the outfield at a Marlins game with an audible pop. The strange hitchhiker sold me some time-share property on Neptune, good through the winter of 2438, and got out, chuckling. When I got home that evening I found my picture was gone from my high school yearbook, I was married to a woman I did not know, and I had a tattoo of lottery numbers on my arm. The numbers hit, and I win six million dollars, and still wound up on relief. A year later I came down with trichinosis and went bald. So Einsten was wrong!

[@kritiasmaple2714]

Ok man. Then tell me how to make a time machinr

[@selvahechicera4292]

I have theories. They were deleted for security reasons.

[@EffySalcedo]

I must say I simply adore your avatar 😀

[@skop6321]

the organization was too fast

[@Killuminati23]

2:57 "Does imaginary mass exist?" ^^ sounds like a metaphysical question, too

[@Yora21]

If a hypothetical question exist, but no philosopher is thinking about it, does it really matter?

[@brianjlevine]

It exists. Also, it doesn't exist.

[@maxunger2309]

Does my imaginary friend exists? He assures me, he does! ☝️

[@AJsAdventuresinAsia]

Did he say IN THE WEED REALM? I'm there like every time I watch this channel

[@paulmichaelfreedman8334]

Dude, I permanently live in the weed realm!

[@15997359]

Why not use the gauge and higgs field to... hence bozon to find out if data of the past is fully encoded in the present for example, is it possible to find some sort of wave equation of ordinary objects, from their subatomic frequencies..if data is indeed encoded uniformaly in the present, can we somehow fourier transform a signal from the higgs field and isolate these "past" frequencies outof these ordinary objects like chairs,tables etc.? En since it can be random events(uniformly distributed) we can apply statistics or discrete math and find a generating function/sequence in which we simulate the past rather then travel there??? Like on a quantum computer⛳ Please respond😭🙏🙏🙏

[@kickinrocks6055]

Ahhh, the Kashmir effect. "... I'm a traveler of both time and space, to be where i have been." I guess Led Zeppelin were the first time travelers.

[@dragosolarv3150]

I love your recreation of Hawking's experiment, but Matt, why would future space time travellers spend (what can be assumed as) vasts amounts of energy to then have to explain themselves to the authorities? Both, our authorities and the space time border control? ;))

[@rwdplz1]

Perfect date to release What if you had two kerr black holes spinning in opposite directions, creating a localized field of space time that travels back in time at a fixed point in space?

[@AntonioGarcia-xw1ei]

But if that were true and traveled back in time would the other black hole not have been created yet and you would be stuck on one side of a black hole waiting for the future for the black hole to be created . Or better yet would you see yourself travelling back to the future thus the process happens all over again?

[@AntonioGarcia-xw1ei]

Or you can believe in the singularity Theroy and turn yourself in to a diamond

[@AntonioGarcia-xw1ei]

I guess what I was trying to say is if both black holes were created at the same time. Or do you travel through the black hole/ Worm hole and travel back in time to when the black hole began to explode in to a super nova? Thus creating the black hole to begin with or when you travel back in time to find yourself in the center of a star that's about to explode in to a super nova and create the black hole you travelled through?

[@antontaylor4530]

Your consciousness is essentially just data stored within an organic computer. If tachyons exist, it may be possible to use them to remap your current state of consciousness onto a previous version of yourself, although this would create a paradox of sorts, because you've now "killed" previous you... At the very least, it should be possible to temporal-email (temail?) yourself the results of the lottery. Entirely possible that has already happened, or at least something similar may have happened.

[@djaz1453]

So the methods that were used in steins gate were real?

[@emmanuelsandovalsolorzano902]

Tachyons, I know this from The Flash.

[@ayaanlalani8227]

The flashhhh

[@speedynabit8460]

Emmanuel Sandoval same

[@LittleJoeTheMoonlightCat]

Yes Exactly, when we See New Versions of The Flash Running, the Speed Force Generates Electricity, Because Barry Alan was hit By a Bolt of Lightning, The Tachyons as You should Remember Escaped. And when they did areas they Escaped to Are Places Where Barry Can Travel through Time. Electricity is Key To Unlocking Tachyon Particles, as they Move Faster than Light. as Doc Brown Said 1.21 Gigawats.

[@Eh_O_Nico]

I know it from Watchmen and Dr Manhattan

[@LittleJoeTheMoonlightCat]

@@Eh_O_Nico, Yea It's How He Knew about the JFK Assassination, and How He gets to Mars, his whole body is made of Tachyon Particles.

[@budgieball]

Who else is watching this in December 2109?

[@yashirotheultimateseraphim4521]

It’s 5 months in the future:0

[@tackontitan]

@Mohammed Ali the g get off of here, youngster! The rules say you can't have a KZbin account until you're 2,500 years old.

[@mathieuaurousseau100]

@IhateECHOES Define "white"

[@jorgepeterbarton]

@Mohammed Ali the g yeh but only if pledge alegience to the light beings from that rift that opened up. Is it truly freedom to live so long?

[@John-eq8cu]

Its Pace... Time. Good one! Ending with Space-time with only different punctuation. A worthy episode

[@colepenick5238]

The first time a video title in the form of a question whose answer is “yes”

[@hadroncollider17]

You forgot one simple method: rearranging all the particles in the universe to a specific arrangement of position, energy, and momentum in space. This would only require a second universe with lower entropy to work from. Haha!

[@evilotto9200]

Call it a Save Point and then ask yourself if you are an NPC or playable character

[@mikester1290]

The Omega 13

[@SHERMA.]

i once tripped and started thinking: "i wonder if a previous civilisation could never crack FTL transport and was stuck trying for many many years.. eventually their simulation technology advanced so far they decided to run a simulation (our universe) scattered with life all over in hopes that they would then work FTL transport out... maybe one day many years in the future we finally travel faster than light and boom.. our universe stops" simulation complete

[@bierrollerful]

Sadly, in order to produce a simulation that provides a solution to a problem, the simulation's programming must already include that solution in some way. Even if the solution results from emergence, you'd still have to somehow provide the simulation with the parameters for that emergence to occur. And if we knew the parameters, we wouldn't be sitting here pondering about this question. PS: what you are describing is the "simulation hypothesis"

[@otaviocamanho1135]

Kind of like rick and morty engine battery.

[@Hakasedess]

@@bierrollerful I mean, what you just said would imply all use of simulation within science is redundant, and that's just not true. We use simulations all the time because at some point, the amount of variables and the sheer density of the math becomes far too much for a human being to compute and keep track of, while a computer does it as easily as we breathe.

[@ruinenlust_]

@@bierrollerful What? We're talking about a search problem here. A search for a design that works within our current understanding of physics. We're not looking for new physics because obviously, that cannot emerge from a simulation.

[@bierrollerful]

​@@Hakasedess You misunderstood. To use a an example: In the TV series Stargate Universe, in order to realize an expedition to a far away place they had to solve what was essentially a mathematical problem devised by aliens - which nobody was capable of. One of the scientists then wrote a video game which he then spread to the public to let the players solve that problem for them. This in itself is a bit of a paradox: In order to write that video game, the solution to that problem must have been programmed into the game. The technical name for this predicament sadly escapes me at the moment, but in essence you cannot have an algorithm that provides a solution to a problem you cannot solve - the algorithm itself already is the solution. A computer simulation isn't just a hodgepodge of variables. It's still "steered" by an algorithm - in the case of cosmology this algorithm is an *abstraction* our understanding of the physical laws. Sadly, you cannot make an infinitely complex algorithm, there needs to be limitations. So you need to know, in advance, which "bits" you can safely leave out while still guaranteeing (in some measure at least) that the solution can occur - which itself requires a deep understanding of the interactions that can happen within that simulation. This then feeds into the "Inventor's paradox" where (stealing from wikipedia) "to solve what one desires to solve, one may have to solve more than that in order to get a properly working flow of information". Meaning: on your way of creating the simuation, you must also explore a lot of the possibilities. This can already lead to the solution. Or you run an infinite amount of simulations for the entire infinite range of possible parameters: impossible. Emergence is a way around this, since emergent properties are by definition something that cannot be anticipated from the properties that produced them. You "accidentally" stumble across the solution. But that still requires you to know what emergent property you are looking for and, in the case of a computer simulation, requires the set of of rules (the algorithm) to allow for that emergence to happen... which you cannot, again by definition, know in advance. So what are the circumstances your are looking for that make the simulation stop? What are the parameters that make up the termination condition of the simulation? How do you know that time travel has occured in your simulation?

[@grimlips6596]

"nor reverse it's pace: time". Great punchline sir, have my like.