Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
You can't tickle yourself.
29
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
The average person will go on a date at least 100 times before they finally marry.
33
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62