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Science in Seconds - Time Travel

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Science in Seconds Know Everything RUMOURS - Time Travel Brit Trogen: The adage goes, the only way to go back in time is to travel faster than the speed of light, which is impossible. True under normal circumstances, but surprisingly it's actually possible to beat a light beam across space, provided you bend the rules a little. If you imagine the normal rules of space-time as a trampoline, then certain forces like gravity are like putting a bowling ball in the middle. They warp the dimensions, making all kinds of crazy things possible. The best hope for time travel is wormholes. If you want to travel from point A to point B on a napkin for example, you could cross the whole distance, or fold the napkin in half, bringing the two points directly adjacent. Wormholes are tunnels in space connecting distant points, which could be used by some crazy advanced civilization if they could figure out a way to prop them up against gravitational forces. If you accelerate one end of the wormhole close to the speed of light then bring it back to its start point, hypothetically you'd have a time machine. I know what you're thinking, maybe humans could do this. No, we're not smart enough. But since there is no physical law making time travel impossible, give it a few thousand years and we'll get back to you. But hypothetically what about going back in time and killing your grandfather or any other of the billion paradoxes that could arise? Well, no one really has an answer for that yet. Although some, like Stephen Hawking, think the universe has a built-in chronology protection which would make time machines explode as soon as they're made, in order to protect the past. All that work for nothing! But then again, do you really want to get stuck in some crappy time period? You're probably better off just staying here. Courtesy of Science in Seconds – All rights reserved Only for educational/non-profit purposes. (Translators are invited to put their name here)

Video Details

Duration: 1 minute and 58 seconds
Country: United States
Language: English
License: All rights reserved
Producer: Science in Seconds
Director: Science in Seconds
Views: 71
Posted by: tradottiinitaliano on Sep 8, 2011

Is time travel scientifically possible?

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