The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Scientists aren't sure what color dinosaurs were.
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German chemists made a replica of a trophy the size of one molecule.
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One third of the electricity produced on earth is used to power electric light bulbs!
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Airports that are at higher altitudes require a longer airstrip due to lower air density.
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In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
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