I don't know if it's possible, but I hope not. This world is messed up enough as it is; imagine what we humans could screw up if we could travel back and forth in time. Sounds like a true nightmare to me; imagine if Hitler, Trump, Putin, Mussolini, Jack the Ripper, or anyone else could move freely through time? Lord love a duck! Makes me shudder just to think about it.

Extraordinary claims require extraordinary proof. If any of these people can give a convincing explanation of the mechanism that allowed them to travel back through time or provide an artifact that does not currently exist (such as, perhaps, an IPhone5000, which I hope features a battery that doesn't run out just when you most need it) then perhaps their claims should be at least properly refuted. If they just show up and say "Yeah, I'm from the future, honest" then no further action is required.

can't go backwards

They just discoverd a boson that was pear shaped and finding this means time travel is impossible ( Summit to do with symmetry) . These guys are just wackjobs pretending to be from the future

Testable, verifiable, falsifiable, evidence--or it didn't happen.

One other thing: look at typical clothing in developed societies today compared to a century ago, and a century before that. Are these people who claim to have travelled from the future wearing the same clothes we wear? The only reason they might do so would be to blend in - but if they wanted to do that, why would they tell anyone they're from the future?

Micheal J Fox tried to warn us of an impending doom when he traveled through time. So I guess its possible just not productive.

Forward, is possible, but not achievable (yet?), by travelling near the speed of light. Backwards time travel requires travelling faster than the speed of light. It's likely impossible. Findings are all based on the study on how photons travel - based on Einstein's postulations on time.

Here is Brian Cox explaining theoretical time travel forward:

Here is SpaceTime YouTuber explaining superluminal time travel for time travelling backwards:

I am a sci fi fan, but time travel sits firmly in fantasy for me. I don't think of time in a way that such would be possible. Stephen Hawking made some of the most stupid comments I have ever heard in my life on the subject of time.

Originally, I thought that the collapse, would be the time reverse of the expansion. This would have meant that the arrow of time would have pointed the other way in the contracting phase. People would have gotten younger, as the universe got smaller. Eventually, they would have disappeared back into the womb.
However, I now realize I was wrong. Stephen Hawking.

I highly doubt they are real.

The problem is that we are on a planet that rotates aroudn a sun, in a solar system tht is rotatign aroudn a galaxy, which is traveling accross the iniverse. Sw traveling in time is problematic due tothe fact tht our plant is traveling at over 10,000 mph and various favitational influences have influenced trajectories, whcih over time can result in huge errors fo distance calculations. Because you see you not only have to travel through time, but also space... that is if you expect to live through it. Even if you calculated back one hour, you'd be in outer space, unless you traveled in both time and space and got he calculations just right to pop out in the sem place ohn earth.

Time travel to the future is not true. Speeding up to near speed of light (300,000 km per second) will slow time down and appear to be time travel, but it really isn't in the strictest terms. Time travel to the past, if possible, would most likely send you to another Universe to avoid a paradox. If it was possible to tavel back in time to our Universe you would be following the course of what happened back then with out any control of your actions. But I read too much Sci/Fi so forgive me.

Theoretical possibilities through wormholes and black holes. But the practicality of getting matter faster than light to go backwards in time... I am highly skeptical of it.

Our understanding of physics constantly changes. Who's to say they don't invent it later? However, who's to say they /do?/. I agree that I'll need much more substantial proof before I believe any of these claims. As to warnings about the future... eh. I follow the Many Worlds Hypothesis. It's the only one that makes sense to me.

Any reports saying that time travel is real iare pure poppycock!!

I strongly disbelieve time travel is possible.

I'm not even renting this bullshit, let alone buying it.

Few listen to credible warnings that occur as we live and breathe, I cannot see it would have much of an effect from the cast of persons that make these claims and the excuses they give for not having any actual utilitarian knowledge from an alleged future.

If time travel was possible backwards, it would have to be forbidden in that any change even the mere prescence of someone from the futrer could inadvertanly change the course of history. Likewise, if a person could time travel to the future, the future would be changed by the fact that if they came back, they would alter the future for those who lived there. So, even if possible, too much of a risk of inadvertant change.

I was reading this morning bout a guy who claims to be an alien stranded on earth from the year 6000 and something I don't buy it I just wondered what popular theory on it waz

No don't think it will ever happen,we would have folk passing through here on a regular basis if so. Besides as all good sci fi fans know interfering with your own past could have some alarming outcomes.

Time travel is a great Sci-fi premise but for real? Not yet and possibly never. Unless they're really good at hiding/proving it, we haven't seen anybody from our future, unless they have a Star Trek esque Temporal Prime Directive lol
Another thought on time, if we could place a giant mirror say 1 light year away from earth and pointed a telescope at it would we see the earth as it was 2 years ago (I assuming 1 year for each way)?