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Cyanide works by making the human body unable to use oxygen.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.