The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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In one day, adult lungs move about 10,000 litres of air.
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If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
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Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
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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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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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The human brain has the capacity to store everything that you experience.
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