Steve Mirsky talks to Mary Roach about her new book Packing for Mars: The Curious Science of Life in the Void:

On shorter jaunts into space, some of the stuff humans produce is simply chucked from the ship. The physiologically confusing term of art for one such action is the “urine dump.” And, believe it or not, space pee is pretty. “A number of astronaut memoirs mentioned how these flash-frozen droplets, illuminated, would look like this silvery snowstorm,” Roach told me. “I think three different astronauts mentioned how beautiful the urine dump was.”

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