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 average sperm cell swims at 8 inches per hour.
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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.
55
Your heart will pump about 212 million liters in its lifetime.
26
Yawns are more contagious among people with closer relationships.
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Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
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