According to Stephen Hawking, building a time machine isn't hard: "All you need is a wormhole, the Large Hadron Collider or a rocket that goes really, really fast." Just grab one of those and hop right through the fourth dimension.

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In an article for the Daily Mail, Hawking discusses time travel and theoretical possibilities. It's a long read that'll make your head spin, but it's certain to leave you awed and perhaps a bit hopeful. [Daily Mail via MSNBC]