Balsa wood is classified as a hard wood!
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The only letter not appearing on the Periodic Table is the letter "J".
180
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
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German scientists claim to have evidence that suggests that our universe may exist inside of a computer simulated Matrix.
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