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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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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.