Jamaican sprinter Usain Bolt

Associated Press
This undated handout photo provided by Nature shows a wild cheetah wearing a Royal veterinary college collar in Northern Botswana. Scientists have long known that cheetahs are blazingly fast, but new research shows how it's their acceleration and nimble zig-zagging that really leaves the rest of the animal world in the dust and scientists in awe. Humans can't even get anywhere near close, not even Olympian Usain Bolt. Cheetahs outpace Bolt two-to-one on a straight away, but that's nothing. When scientists measured what really counts _  raw muscle power for acceleration and maneuvering _ cheetahs easily mustered four times more of the crucial kick than what  the Olympic sprinter could manage while breaking world records, according to a new study in the journal Nature Wednesday.   (AP Photo/Nature)

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The Jamaican sprinter and three-time Olympic gold medalist will be one of the biggest names to watch at the London Games.

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