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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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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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Excessive alcohol use costs the country approximately $235 billion every year.
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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.