The average sperm cell swims at 8 inches per hour.
4
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Obsessive nose picking is called Rhinotillexomania.
101
The world's shortest man measures only 21.5 inches.
73
If the human eye was a digital camera, it would have 576 megapixels.
25
The human sigh acts as a physiological reset button.
23
The human brain doesn't stop developing until about 25 years old.
102
Human hair and fingernails continue to grow after death.
7