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
Research has determined that most people are happiest at 7:26pm on a Saturday night.
70
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The world's shortest man measures only 21.5 inches.
73
We share 70% of our DNA with a slug.
218
Pain occurs when sounds are above 130 db.
123