It has been scientifically proven that stroking a cat can lower one's blood pressure!
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Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
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The human brain has the capacity to store everything that you experience.
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Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
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The average sperm cell swims at 8 inches per hour.
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You can't tickle yourself.
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The human brain doesn't stop developing until about 25 years old.
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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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