You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
21
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Within three days of death, the enzymes that once digested your food begin to eat you.
22