Tigers can see 6 times better at night than humans.
305
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Poor eyesight (myopia) is associated with higher IQ.
232
You forget 90% of your dreams.
256
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
On average a woman has 4 sexual partners in her lifetime.
-143
Early American humans hunted car-size armadillos and used their shells for houses.
12