Nobel Prize winner Roger Tsien dies; helped track cells

Roger Tsien, a University of California, San Diego professor who shared the 2008 Nobel Prize in chemistry for helping develop fluorescent markers that could tag cancer cells or track the advance of Alzheimer's disease in ...

Intensifying Tropical Depression 9 checked by NASA

Heavy rainfall is a big part of Tropical Depression 9, which is strengthening in the Gulf of Mexico. The Global Precipitation Measurement mission, or GPM, core satellite passed over the gulf in space and measured that rate ...

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