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The familiar sounds of your heart are made by the heart's valves as they open and close.
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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.
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Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.