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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A ball of glass will bounce higher than a ball made of rubber.
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Pumice is the only rock that floats on water.
14
At room temperature, the average air molecule travels at the speed of a rifle bullet.
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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.
15
Most dust particles in your house come from dead skin.
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One gallon of used motor oil can ruin approximately one million gallons of fresh water!
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