Clair Perry's picture of space flushing - that's the flash at the top of the photo.
Over at Spaceweather.com, there's photographic proof that astronauts are human like the rest of us - they even have to make No. 1 way up in space.
No, it's not pictures of galactic urinal cakes. Better. How 'bout a urine shower in the stars, courtesy of the crew of the Shuttle Discovery as they prepared to land in California on Friday?
Hey, it's gotta go somewhere, right?
In Madison, Wisconsin, photographer Abe Megahed witnessed a similar display: "The shuttle was sporting a massive curved plume. What could it be? Something venting? Reaction Control System thrusters? A massive, record-breaking urine dump?"
So the lesson here is to keep your eyes to the skies, but keep your mouth shut.