Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Within three days of death, the enzymes that once digested your food begin to eat you.
22
The human brain uses approximately as much energy as a 10 watt light bulb.
120
The human body contains over a billion miles of DNA.
147
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130