By weight, Bone is five times stronger than steel.
417
Your thumb is about the same size as your nose.
124
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
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Pain occurs when sounds are above 130 db.
124
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14