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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A 'jiffy' is an actual unit of time for 1/100th of a second!
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When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
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A cubic yard of air weighs about 2 pounds at sea level.
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Scientists are now able to grow 'beating' heart tissue in a lab!
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There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
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Aluminum used to be more valuable than gold!
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