1 Nearly every astronaut experiences some space sickness, caused by the wildly confusing information reaching their inner ears. In addition to nausea, symptoms include headaches and trouble locating your own limbs. Just like college, really.
2 And those are the least of your worries. In weightlessness, fluids shift upward, causing nasal congestion and a puffy face; bones lose calcium, forming kidney stones; and muscles atrophy, slowing the bowels and shrinking the heart.
3 At least you’ll be puffy, constipated, and tall: The decreased pressure on the spine in zero-g causes most space travelers to grow about two inches.
