When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Diamonds can be shattered with a hammer.
-104
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Indoor pollution is 10 times more toxic than outdoor pollution.
62
For every gallon of sea water, you get more than a quarter pound of salt.
45
Each day, up to 150 species of life become extinct.
-23
The force of a suction cup is calculated using F=AP.
15