On average, there's 100 billion neurons in the human brain.
83
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
The human brain uses approximately as much energy as a 10 watt light bulb.
120
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
Banging your head against a wall uses 150 calories an hour.
57
Fingernails grow nearly 4 times faster than toenails.
31