In zero gravity, a candle's flame is round and blue.
16
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Pumice is the only rock that floats on water.
14