Science When did human bodies evolve to sweat? We don't know exactly when 5:07am August 25, 2022 by Pien Huang Science Share URL copied to clipboard! Copyright 2022 NPR. To see more, visit https://www.npr.org. 300x250 Ad More Morning Edition World News National To hit deep inside Russia, Ukraine has built its own drones by Greg Myre Arts National Percival Everett wins the National Book Award fiction prize 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate