An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
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In one day, adult lungs move about 10,000 litres of air.
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Enamel is hardest substance in the human body.
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Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
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The average person has over 1,460 dreams a year!
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Contrary to popular beliefs, chocolate does not cause acne.
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Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
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