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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.
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The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.
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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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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.