Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
How to integrate using inverse trigonometric substitution (Question 5)