The average sperm cell swims at 8 inches per hour.
4
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
Poor eyesight (myopia) is associated with higher IQ.
232
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
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
Your fingernails grow faster in summer.
744
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23