In zero gravity, a candle's flame is round and blue.
16
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
One barrel of petroleum holds 42 gallons.
20
One cubic foot of gold weighs more than 1,200 pounds!
78
Pumice is the only rock that floats on water.
14
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155