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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If you are cold you are more likely to be hungry because you use energy to keep warm.
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Your heart will pump about 212 million liters in its lifetime.
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Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
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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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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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