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Is time travel to the past possible?

CrabCake said:
Yes, I believe it's theoretically possible. But I don't believe we will ever achieve it. If we ever achieved time travel in the future, we would have run into time travelers by now in our present or past.
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I have meet plenty of time travelers from the past. They got to the present the same way I did.. one day at a time.
 
I am too busy to go into detail but tomorrow Ill post an explanation of why it isnt possible. You can read about my explanation yesterday
 
Captain Adverse said:
This response begs the question.

How do you KNOW we haven't run into anyone from the future?

One of prime issues with traveling into the past is the Time Travel Butterfly Effect. It posits that changes effected by the presence of a time traveler will ripple into the future causing a different future. Therefore, time travelers would strive to remain anonymous.

So they would be here or in the past and we would never know it.
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We can't know for sure. But if time travel were possible, you would expect to find some shred of evidence at some point and the fact is, we haven't. If time travel is possible in the future, then people in the future are far more competent than we are, and I find that unlikely.
 
It seems rather unlikely. Our conception of physical reality would have to be completely and utterly wrong, yet, we have confirmed quite a bit of it thus far.


Were it possible, it would be the highest extreme of recklessness to attempt it.
 
soot said:
My understanding is that the greatest scientific minds of our time believe that it is theoretically possible at a minimum to create a "wormhole" that will allow folks in the future to travel back in time to the point at which the wormhole was created. That is, of course theoretical since we have no idea how to create a wormhole in time nor do we have any idea one would travel through such a hole.

It is also proposed that such wormholes already exist "out there" in the universe, perhaps on the inside of black holes, and that we might one day discover a way to both locate such holes and then travel through them in such a way which does not lead to the immediate destruction of both time traveler and time machine (no theoretical model for doing so has yet been proposed).

In so far as traveling back in time via a "time machine" that would allow the traveler to select any arbitrary date and location in the past and then travel to it is concerned, there is not even a reasonably constructed theory that would allow for it.

So is it possible?

Theoretically yes, with limitations.
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I believe that quantum mechanics predicts the existence of spontaneous formation of "wormholes," however: (1) they've never been observed, (2) the predicted wormholes would be at the small end of the subatomic scale, (3) they would only exist for the tiniest fraction of a second.
 
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