Alright VS smarties out there...time to teach Swampgirl some more physics...

I would like to see the rest of this show. Is what he's saying at all possible here?

Oh, and is it the "Discover" or "Discovery" channel? I want to make sure the title is correct.

it's the discovery channel, swampgirl!

I think this is a clip of the original (UK dub) of The World's First Time Machine.

My physics kung fu is not as strong as I would like, but here goes.

According to relativity, space and time are part of the same thing, called space-time. Anything with the property of mass deforms the space-time around it, like a bowling ball sitting on a trampoline deforms the surface of the trampoline. That deformation of space-time is gravity; if you sit another object on the trampoline it will roll into the dent caused by the bowling ball. The effect the deformation has on time is that time passes more slowly the deeper you are in the dent. For Earth sized masses, the effect on time is small, but for something as massive as a black hole(a far, far deeper dent) the difference would be appreciable. You can imagine if the bowling ball on the trampoline was heavy enough and spinning fast enough that it would try to twist the surface of the trampoline around with it; black holes do this to space-time too. This is about where the explanation at the beginning of the video jumps in.

Due to the effect mass has on time, some proposals for a time machine suggest finding/making a wormhole, moving one end of the wormhole deep into the gravity well of a black hole(where time passes more slowly), then entering the far end; you would emerge near the black hole at some point before you entered. The distance into the past you travel would depend on the depth of the gravity well and when you enter the worm hole; if time at the black hole passes at 1/2 the normal speed and you enter the wormhole 10 years after the setup was put together, then you would travel 5 years into the past. However, the method suggested in this video does not appear to rely on the effect the black hole has directly on time and instead relies on the black hole's twisting of space somehow allowing you to violate the speed of light(relativity says nothing can travel faster than the speed of light: 299,792,458 m/s). How that translates into traveling back in time I'm not sure. I'm also not sure how you get all this using lasers instead of extreme mass.

You know, oddly enough I actually had theorised something similar to this a few years back. Wish I could find my papers on it.

Of course for me it was as a vehical to a Scifi story. Where there was a machine where you could send information to the past, and thus it would create a boon in technology, since the people of the future could just send the technology to the past.

But yeah, cool VS.

Uh, just found this after 11 months..

Bunk, bunk I say. Any info sent back would cause a paradox and make it so you could make a paradox.

Supose you send the lotterynumbers back to yourself, before they were drawn, and you win. What happens to future-you? What if past/rich-you doesn't send the numbers back?

The only thing a "time machine" can do is make you go forward, by accelerating to near-lightspeed and slowing your local time, while the world around goes at the normal pace.