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St. Paul, Minn.

Science of the brain

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Brain scan
A scientist inspects a human brain in a research center in Siberia, January 4, 2007.
Photo by VALERY TITEYEVSKY/AFP/Getty Images
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Brain scan
A scientist inspects a human brain in a research center in Siberia, January 4, 2007.
Photo by VALERY TITEYEVSKY/AFP/Getty Images