When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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Your heart will pump about 212 million liters in its lifetime.
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Human hair and fingernails continue to grow after death.
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Research has determined that most people are happiest at 7:26pm on a Saturday night.
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Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
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After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
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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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