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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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
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Your thumb is about the same size as your nose.
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Your heart will pump about 212 million liters in its lifetime.
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All the chemicals in a human body combined are worth about 6.25 euro (if sold separately).
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Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
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An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
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