Loneliness activates the same brain regions as physical pain — social exclusion hurts neurologically.
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The average adult human has 32 teeth.
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The saber-toothed cat went extinct around 10,000 years ago.
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The Earth is slightly flattened at the poles.
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The Ice Age ended about 11,700 years ago.
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A hyena’s jaw is powerful enough to crush bone.
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The Thirty Years’ War affected much of Central Europe.
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In 1953, Watson and Crick described the double-helix structure of DNA.
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Border collies can learn hundreds of word-object associations.
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