It takes about 20 seconds for a red blood cell to circle the whole body.
102
If the human eye was a digital camera, it would have 576 megapixels.
25
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
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
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
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
Only humans shed emotional tears.
331
Poor eyesight (myopia) is associated with higher IQ.
232