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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.