During his 12-month tenure, Kelly will drink about 730 liters of recycled urine and sweat -- some of which, you may recall, will come from the Russian cosmonauts, who don't partake in the processed pee themselves. He will see almost 11,000 sunsets. He will run 648 miles on a space treadmill. Enough fluid to fill a large bottle of soda will move from his legs up toward his head, because microgravity is a pain in the . . . well, everywhere.