The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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Airports that are at higher altitudes require a longer airstrip due to lower air density.
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The sun is 330,330 times larger than the earth.
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A cubic yard of air weighs about 2 pounds at sea level.
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Iron weighs more after it rusts.
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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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