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
Your heart will pump about 212 million liters in its lifetime.
26
A man's beard grows fastest when he anticipates sex.
239
Gorillas can catch human colds and other illnesses.
205
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69