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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When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
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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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There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
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In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
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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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