The human brain has the capacity to store everything that you experience.
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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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The average sperm cell swims at 8 inches per hour.
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If your DNA was stretched out it would reach to the moon 6,000 times.
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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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Our eyes are always the same size from birth, but our nose and ears never stop growing.
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Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
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Your thumb is about the same size as your nose.
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