Diamonds can be shattered with a hammer.
-104
Cold water weighs more than hot water.
93
Pumice is the only rock that floats on water.
14
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Hot water can freeze faster than cold water.
181
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199