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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In one day, adult lungs move about 10,000 litres of air.
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Only humans shed emotional tears.
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Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
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The human brain has the capacity to store everything that you experience.
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Tigers can see 6 times better at night than humans.
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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Babies crawl an average of 200m a day.
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