Discover magazine has this article listing “20 things you didn’t know about living in space. Some of the interesting ones from the article:

• The decreased pressure on the spine in zero-g causes most space travelers to grow about two inches.
• A 2001 study showed that astronauts who snored on Earth snoozed silently in space.
• Astronauts spice up their meals with salt and pepper—in liquid form. Sprinkled grains would float away, tickling noses and clogging vents.
• Some long-duration cosmonauts report that the hardest thing to readjust to about life on Earth is that when you let go of objects, they fall.