The human brain doesn't stop developing until about 25 years old.
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After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
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Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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It takes twice as long to lose new muscle if you stop working out than it did to gain it.
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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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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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