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
The average person's skin weighs twice as much as their brain.
131
One human hair can support 3 ounces.
191
Poor eyesight (myopia) is associated with higher IQ.
232
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
Every human spent about half an hour as a single cell.
144
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
Research has determined that most people are happiest at 7:26pm on a Saturday night.
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