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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The average adult has about 21 square feet of skin.
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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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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.