If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
A person can live without food for about a month, but only about a week without water.
156
The average sperm cell swims at 8 inches per hour.
76
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
If you hold farts in during the day, they'll just come out when you sleep.
16
Your body is creating and killing about 2.4 million red blood cells per second.
17
