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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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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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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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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.