Tigers can see 6 times better at night than humans.
305
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
On average a woman has 4 sexual partners in her lifetime.
-143
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
If the human eye was a digital camera, it would have 576 megapixels.
25
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The average sperm cell swims at 8 inches per hour.
4