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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The horizontal fraction bar was introduced by the Arabs.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.