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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.
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Cyanide works by making the human body unable to use oxygen.