Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Diamonds can be shattered with a hammer.
-104
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Hot water can freeze faster than cold water.
181
A ball of glass will bounce higher than a ball made of rubber.
73
In zero gravity, a candle's flame is round and blue.
16
No matter how cold it gets, gasoline will not freeze.
107