The world's shortest man measures only 21.5 inches.
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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 human brain uses approximately as much energy as a 10 watt light bulb.
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The human body contains over a billion miles of DNA.
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It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
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It has been scientifically proven that stroking a cat can lower one's blood pressure!
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It takes approximately 12 hours for food to entirely digest.
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Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
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