Will we ever have a theory of everything?

Physicists want to find a single theory that describes the entire universe, but to do so they must solve some of the hardest problems in science

The recent film The Theory of Everything tells the story of Stephen Hawking, who managed to become a world-famous physicist despite being confined to a wheelchair by a degenerative disease. It's mostly about his relationship with his ex-wife Jane, but it does find a bit of time to explain what Hawking has spent his career doing.

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