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The astronaut who completed a triathlon in space


NASA requires its astronauts to exercise on space flights to fight off the debilitating effects of zero-gravity on the body’s bone and muscle. But Sunita Williams, U.S. commander of the Expedition 33 crew at the International Space Station, took things to another level when she completed the first ever triathlon in space — running, biking, and even swimming to compete with Earth-based athletes 240 miles below in Southern California.

Take a look at Williams’ stunning achievement below.

View video at The Week.

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