Humans' ability to sweat is useful on Earth — but when people go up into space, they find that perspiring in zero gravity presents some unique challenges.
This summer, we have been examining sweat in a series of stories on all aspects of perspiration. Today we are leaving the planet to ponder sweating in space because, as NPR's Nell Greenfieldboyce reports, sweat is a big deal for space travelers.
GREENFIELDBOYCE: Mike Massimino is now a professor at Columbia University. He says in space, sweat won't drip off of you.GREENFIELDBOYCE: Instead, in microgravity, water tends to cling to whatever surface it's touching. So he says if you're on an exercise bike... MASSIMINO: That's a real athletic event when you're spacewalking. They typically run about 6 1/2 hours, and you're moving that whole time typically. And so you can build up a heavy heat load.
GREENFIELDBOYCE: Electronics and water just don't get along. So in the space station, any and all water in the air, like from sweat, has to get collected.
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