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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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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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ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.