Banging your head against a wall uses 150 calories an hour.
57
Your stomach produces a new layer of mucus every two weeks so that it doesn't digest itself.
160
Pain travels through your body at 350 ft. per second.
36
Dating back to the 1600's, thermometers were filled with Brandy instead of mercury.
16
Every year your body replaces 98% of your atoms.
119
It takes about 20 seconds for a red blood cell to circle the whole body.
102
A fetus develops fingerprints at eighteen weeks!
32
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46