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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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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Only humans shed emotional tears.
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Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
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In one day, adult lungs move about 10,000 litres of air.
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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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On average, there's 100 billion neurons in the human brain.
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Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
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