Intelligent people have more zinc and copper in their hair.
233
Every human spent about half an hour as a single cell.
144
Most of the world's people must walk at least 3 hours to fetch water!
38
Approximately one-third of the population can't snap their fingers!
91
People with blue eyes are better able to see in the dark.
153
One in 500 humans has one blue eye and one brown eye.
145
Only 2% of the Earth's population are natural redheads.
13