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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).