Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The human body contains over a billion miles of DNA.
147
A man's beard grows fastest when he anticipates sex.
239
The human brain doesn't stop developing until about 25 years old.
102
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99