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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The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
It has been scientifically proven that stroking a cat can lower one's blood pressure!
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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
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Our brains have a negativity bias and will remember bad memories more than good ones.
15
Research has determined that most people are happiest at 7:26pm on a Saturday night.
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