Nylon is made from coal and petroleum.
42
Pumice is the only rock that floats on water.
14
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Each day, up to 150 species of life become extinct.
-23
The force of a suction cup is calculated using F=AP.
15
Iron weighs more after it rusts.
68
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79