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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

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In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Elrathia kingii growth series with holaspids ranging from 16.2 mm to 39.8 mm in length Elrathia kingii growth series with holaspids ranging from 16.2 mm to 39.8 mm in length
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In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai
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Carrie Mae Weems, Untitled (Man Smoking/Malcolm X), from The Kitchen Table Series. Carrie Mae Weems, Untitled (Man Smoking/Malcolm X), from The Kitchen Table Series.
Video: Basic rhythm - control centers in medulla oblongata, spirograph and normal tidal cycle

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