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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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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

