The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
The world's shortest man measures only 21.5 inches.
73
The human eye blinks an average of 4,200,000 times a year.
233
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
You can't tickle yourself.
29
The average sperm cell swims at 8 inches per hour.
4
A person can live without food for about a month, but only about a week without water.
156