Smarter Every Day - Burning Astronaut Pee

How astronauts exercise effectively in a zero gravity environment.
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Promoting this video and sending it back into the queue for one more try; last queued Thursday, December 31st, 2015 10:57pm PST - promote requested by eric3579.

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Promoting this video and sending it back into the queue for one more try; last queued Friday, January 1st, 2016 4:35am PST - promote requested by eric3579.

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