Is Time Travel Really Possible?

[TheActionLab]

The weirdest part about this video is that while I was walking up to the bridge I had not made the invitations yet. However, I intended to make them in the future after the party. So that means if time travelers were to come or not would be completely dependent on only the thoughts in my head at that point. I simply had to think it or intend to do it and that meant it was already done in the future. So, to give me the best chance for time travelers to show up, I realized that no matter what happened I had to resolve in my brain that I was going to make the invitations after the party.

[ClipHero]

Do you know what the difficult part is? He very likely didn't meet anyone at his party, but as explained by the self-consistency theorem he's probably aware that he has to make the video anyways, because otherwise it would be his own fault nobody showed up. Because if he didn't make the video after nobody showed up, he would cause nobody to show up in the past, even though he already knows noone was there.

[RavenLuni]

Hope the party went well. I got my calculations wrong and landed in mid air 100 years before the bridge was built ;)

[yinglish]

What if, as a general rule of thumb, that time travelers traveling back in time must be in a "isolation bubble" to a read only version of the world. This way, they can see and view the events but never interact with the world as to not alter the events that happens after it.

[smilo]

I remember having a similar idea in elementary school.
Me and a friend wrote a letter to our future selves that had the date and time and instructions to come to our school if we ever get the ability to time travel.

The fun part was that some old guy actually showed up and looked around for a little bit, looking confused before he left and we totally freaked out,
but I lost the letter quickly after the class and forgot the date so I guess the old guy wasn’t one of us in the end

[spacepopeXIV]

You're seriously one of the best science channels on YouTube, you explain things so clearly and easily for any layman to understand and be completely astounded by. I really appreciate this channel and all that you do.

[Tibbs_Farm]

I have a small feeling that Action Lab actually has a higher probability of time travelers showing up.

1) Confidentiality
2) it is at a location that could actually be viewed as people just walking over a bridge
3) action lab seems more fun than hawking

[surajvkothari]

The closest I got to time travel is travelling into the future. It's when we go to deep sleep at night. Since are senses are reduced, the passage of time is not felt, therefore what seems like about 10 hours, feels like a couple minutes!

[joelcathey]

Has anyone tried to explain how time traveling to the same geographical location on Earth could theoretically happen, given that the earth’s universal location is changing drastically every second? Something like 250 miles per second… Like would wormholes be linked to a gravitational field or something?

[Tiedyeman]

One thing almost any theory of time travel overlooks is space. To travel back in time you'd have to go back to where the Earth was at that time, which could be thousands or millions of miles from where it is in the present as the entire solar system moves through the galaxy at a pretty good pace. The galaxy is also in motion through the cosmos, all of these motions and distances would have to be accounted for or you'd end up in space without a planet to stand on.

[Arick_jr]

The more I think of Time-Travel in my head makes me go down in a spiral of what could happen if I met my past self and did something. What if I'm not the same person?
What if I have different living circumstances?
What if it makes a loop that keeps repeating it's self?
What if there is time travelers among us?
I keep having those thoughts that make you wonder if this could actually be possible and work to our benefit.

[k.k]

I think another cool idea would be if the tome travelers left a rock or object at a disclosed location.
No one would ever see them, but you would have the object as proof of the existence of time travel.

[h-e-acc]

This is the kind of Action Lab content I’ve been waiting for. Please, next, explore warp/faster than light travel 🤣

[ProperGanderSaul]

I was there along with 15 other time travelers. I don't mind talking about it because I didn't guarantee any confidentiality. Plus I traveled back for the party but am now stuck here. Hoping future me sees this and makes sure to get a ride home before getting stuck in the past forever.

[wesjames]

That was such a great party I had a fantastic time I cant wait to go I'm really excited!

[malchar]

There was a theory somewhere that time-travel portals could be created. If you enter the portal, you emerge from another portal that was created by someone else at a different space/time. This "solves" Hawking's problem, because it means that time travel could still be possible, but it would be limited so that you can only travel between portals that were built after the invention of the time-travel portal. You could never go back to a time before the portals were invented because there would not be any portals there to exit from.

[ON]

*Imagine an alien shows up at the party!*

[someguyoninternet]

0:27
Action Lab : "You guys here for the party ? "
The Guy : "Yeah"

I don't know if it's fake or not but this part makes me excited.

[JG-ijhb]

I just travel there on Thursday, beautiful bridge and I had a wonderful time. Never thought he was the tall in person

[jer]

1. There is time travel in movies where the rules and laws change depending on how they want the rules to work.
2. If you were to time travel, in my opinion, you would always be going to different timelines like in a multiverse. That different decisions and actions would play out differently. This is seen if you saw the TV show Quantum Leap in the 80's.