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Author Question: Who pioneered open-heart surgery, and with two electronic engineers, perfected a pacemaker? A) ... (Read 125 times) |
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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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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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There are approximately 3 million unintended pregnancies in the United States each year.
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There are more bacteria in your mouth than there are people in the world.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.