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
Tigers can see 6 times better at night than humans.
305
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Your fingernails grow faster in summer.
744
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
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118