The average sperm cell swims at 8 inches per hour.
76
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
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
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
If your DNA was stretched out it would reach to the moon 6,000 times.
256
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55