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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.