The adult human brain weighs about 3 pounds (1,300-1,400 g).
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Your heart will pump about 212 million liters in its lifetime.
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Enamel is hardest substance in the human body.
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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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It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
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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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The human brain uses approximately as much energy as a 10 watt light bulb.
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Every year your body replaces 98% of your atoms.
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