Tigers can see 6 times better at night than humans.
305
Early American humans hunted car-size armadillos and used their shells for houses.
12
Mushrooms are more closely related to humans than they are to plants.
47
If your DNA was stretched out it would reach to the moon 6,000 times.
256
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
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
A man's beard grows fastest when he anticipates sex.
239
On average a woman has 4 sexual partners in her lifetime.
-143