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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.