If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33
Men have larger hearts; women's hearts beat faster.
77
The heart pumps about 1 million barrels of blood during an average lifetime!
30
It takes 17 muscles to smile, 43 to frown.
65
It is almost impossible to sneeze with your eyes open. It is a defense mechanism that has evolved to protect our eyes from bacteria and debris.
164
There is a disease called ichthyosis that turns the skin scaly like a fish.
90
Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
103