Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The average sperm cell swims at 8 inches per hour.
4
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
If your DNA was stretched out it would reach to the moon 6,000 times.
256
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
You can't tickle yourself.
29
One human hair can support 3 ounces.
191