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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The largest cell in the human body is the female egg and the smallest is the male sperm.
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Yawns are more contagious among people with closer relationships.
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Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
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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