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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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There are more sensory neurons in the tongue than in any other part of the body.

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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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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

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