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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Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
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The average temperature at 40,000 feet above sea level is -60 F.
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According to studies, men change their minds two to three times more often than women.
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Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
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Scientists are now able to grow 'beating' heart tissue in a lab!
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The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Nearly 50% of the world's scientists are assigned to military projects.
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