The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
No matter how cold it gets, gasoline will not freeze.
107
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
Scientists in Germany have developed a candy that doesn't cause cavities.
11
Indoor pollution is 10 times more toxic than outdoor pollution.
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