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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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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.