In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
The human brain is more active during sleep than during the day.
28
Enamel is hardest substance in the human body.
61
The world's shortest man measures only 21.5 inches.
73
The average person's skin weighs twice as much as their brain.
131
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
If the human eye was a digital camera, it would have 576 megapixels.
25
Every human spent about half an hour as a single cell.
144