Time Travel

Time Travel
The Universe > Season 5. 08/19/2010
http://www.history.com/shows/the-universe/episodes/season-5
One of the Universe’s most enduring mysteries is Time Travel.
In this episode, we explore the possibilities. Discover why Time Travel into the future is unavoidable in the Einsteinian world of Relativity.
As for the past… the laws of physics do not tell us it’s impossible, but the bizarre consequences of going into the past and altering the future make for mind-bending science.

http://www.youtube.com/watch?v=cytRMq5kQXk
the arrow of time
paradoxes
self-consistency
time dilation
worm hole
Carl Sagan: Contact
time machine
Large Hadron Collider
warp drive; warp bubbles
dark energy as a power source
closest star: Alpha Centauri (4.37 light years from the Sun)

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