Research has determined that most people are happiest at 7:26pm on a Saturday night.
70
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
A person can live without food for about a month, but only about a week without water.
156
Enamel is hardest substance in the human body.
61
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Mushrooms are more closely related to humans than they are to plants.
47
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
If the human eye was a digital camera, it would have 576 megapixels.
25