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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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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
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There are approximately 3 million unintended pregnancies in the United States each year.
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There are 60,000 miles of blood vessels in every adult human.