The printing press was invented around 1440 by Gutenberg — within 50 years, over 20 million books had been printed.
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The first forests appeared during the Devonian period.
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The human brain can process visual information in as little as 13 milliseconds.
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In 1920, a town in Minnesota briefly elected a bear as mayor in a publicity stunt.
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The Sumerians developed one of the earliest known writing systems.
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The Earth's mantle is composed of semi-solid rock.
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Fingernails grow faster than toenails.
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The Earth's axis is tilted about 23.5 degrees.
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Your brain uses patterns to recognize faces almost instantly.
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