Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
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The only letter not appearing on the Periodic Table is the letter "J".
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Indoor pollution is 10 times more toxic than outdoor pollution.
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The earth is approx. 6,588,000,000,000,000,000 tons.
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Sound travels about 4 times faster in water than in air.
408
At room temperature, the average air molecule travels at the speed of a rifle bullet.
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The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
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