Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Human hair and fingernails continue to grow after death.
7
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
All 13 minerals necessary for human life can be found in alcohol beverages.
282
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11