The adult human brain weighs about 3 pounds (1,300-1,400 g).
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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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The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
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Our Right Lungs takes more air than our left lung.
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Chewing gum boosts your brain power.
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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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One human hair can support 3 ounces.
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Your body is creating and killing about 2.4 million red blood cells per second.
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