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Some U.S. presidents go gray in four years, but they still tend to live longer than average. See “Presidency not a death sentence.”

A program in Nepal enlisting motorbike owners as emergency transport saves the lives of people bitten by snakes. Read “Scooters save lives of snakebite victims.”

Tiny hairlike appendages on cells can sequester a protein involved in regulating appetite. Read “Cilia control eating signal.”


Cosmetics and other compounds wafting off tourists’ skin threaten a masterpiece. See “Saving the Last Supper.”

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