Balsa wood is classified as a hard wood!
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Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
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Sound at the right vibration can bore holes through a solid object.
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A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
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Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
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Hot water can freeze faster than cold water.
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Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
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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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