Is Time Travel Impossible?

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Time travel stories are cool because both the past and future are somehow more interesting that the present and because everyone wants a redo. But so far it appears we’re doomed to live consumed by regret in the eternal, boring present. Time marches on, inexorably and only forward. Or so we thought until Einstein came along. His special and general theories of relativity changed the way we think about time forever, and believe it or not, their raw equations permit time travel. They even tell us how to do it. So let’s review the possibilities, and decide how possible they really are.

Hosted by Matt O'Dowd
Written by Matt O'Dowd
Graphics by Leonardo Scholzer & Adriano Leal
Directed by: Andrew Kornhaber
Executive Producers: Eric Brown & Andrew Kornhaber

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[the.amazing.spatterman]

"… nor reverse itS PACE, TIME."

I see what you did there.

[kylebowles]

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

[SplendidFellow]

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

[daemonelectricity]

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

[JohnSmith-oxgy]

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

[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...

[pateralus]

"...its pace: time."

Clever. Intelligence 100.

[GdBearman]

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

[brainmind]

Is time travel possible?

Well yes, but actually no.

[randomnamegbji]

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

[anujarora]

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

[constantinvaldor]

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

[mfpedraza]

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

[Trias]

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

[suhrdjoshi]

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

[zuratu]

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

[michaelchigano]

Time travelers probly siting back looking at this and laughing lmao

[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.

[gprimr]

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.

[ShannonMcDowell]

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