Iron weighs more after it rusts.
16
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
German chemists made a replica of a trophy the size of one molecule.
68
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
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7