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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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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.