[FlamesAllTheWay]

Interesting video, thanks for posting. I had heard of some of the theories before, other ones (especially the last one they leave you with based on computers) I hadn't.

Personally, I will never discount the possibility of time travel. There's far too much we don't know for people to say it can or cannot be done with certainty. One of the biggest snags I see at this point is that we simply do not have the technology to match our ideas. As they said in the video, the amount of energy it would take to test and/or realize the validity of some of these theories does not exist even on our planet as a whole. That's for way down the road, for now we're just going to have to work, for the most part, with the purely theoretical, which is ever changing.

They all basically said that you are restricted to traveling only as far back as the time the machine was used though. So that shoots the whole "there'd be time traveling tourists walking amongst us" theory down it would seem.

I thought they'd do a bit more regarding Quantum Physics, but the video's a bit dated I suppose. I find it interesting that the incredibly small parts of the universe (ie: a photon) are subject to completely different laws of physics. Like how a photon can be a wave and a single point at the exact same time, or the same photon can interfere with itself at two different points. Stuff that further down the road may lead to some breakthrough theories on time travel. I am no expert but one of the theories involved with Quantum physics is that the universe is constantly splitting into billions of parallel universes. Something like this would begin to help us understand what would happen if you travel forward or back in time and say, kill someone important? This has always been a big issue for me because your actions in the past or future would have an effect that would need to be resolved somehow. Like that Halloween episode of the Simpsons where Homer keeps going back in time to the dinosaurs and subsequently wreaking havoc on his present in many hilarious ways.

Aage Nost is our best hope for time travel.