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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.