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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The Earth's atmosphere weighs about 5.5 quadrillion tons.
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The bark of an older redwood tree is fireproof.
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According to studies, men change their minds two to three times more often than women.
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The average temperature at 40,000 feet above sea level is -60 F.
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In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
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Scientists are now able to grow 'beating' heart tissue in a lab!
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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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