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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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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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There are 60,000 miles of blood vessels in every adult human.
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There are 20 feet of blood vessels in each square inch of human skin.
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People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.