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by Heinleinian 5078 days ago
> that the laws of the universe prevent interstellar travel

Not true:

Hawking: Humans must colonize other planets http://www.msnbc.msn.com/id/15970232/ns/technology_and_scien...

'by using "matter/antimatter annihilation," velocities just below the speed of light could be reached, making it possible to reach the next star in about six years. "It wouldn't seem so long for those on board," [Hawking] said.'