The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Diamonds can be shattered with a hammer.
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Most dust particles in your house are made from dead skin!
67
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Pumice is the only rock that floats on water.
14
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9