The average person's skin weighs twice as much as their brain.
131
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
Early American humans hunted car-size armadillos and used their shells for houses.
12
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34
Poor eyesight (myopia) is associated with higher IQ.
232