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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Every human spent about half an hour as a single cell.
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The human brain doesn't stop developing until about 25 years old.
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After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
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If your DNA was stretched out it would reach to the moon 6,000 times.
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The world's shortest man measures only 21.5 inches.
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There are about 255 babies born worldwide every minute.
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A person can live without food for about a month, but only about a week without water.
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