Most dust particles in your house come from dead skin.
48
Iron weighs more after it rusts.
16
German chemists made a replica of a trophy the size of one molecule.
68
A ball of glass will bounce higher than a ball made of rubber.
73
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Pumice is the only rock that floats on water.
14
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9