Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
According to studies, men change their minds two to three times more often than women.
72
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
A cubic yard of air weighs about 2 pounds at sea level.
31
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15