I was reading that the Space X ship was launched today with 1000 lb. of supplies for the space station and I got to thinking, what happens to the poop the astronauts make from these supplies. You never hear about the space shuttle returning to earth with a 1000 lb. load of poop. Liquids, of course, are recycled but solids - I didn't know.
So, I googled it and here is the disgusting answer.