Manhattan Project physicist Ralph Nobles dies at 94

February 25, 2015 4:46 AM

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REDWOOD CITY, Calif. (AP) — Ralph Nobles, a nuclear physicist who worked on the Manhattan Project and later led efforts to save thousands of acres of San Francisco Bay wetlands from development, died following complications of pneumonia, according to his daughter. He was 94.

A Redwood City resident for half a century, Nobles died Friday at Kaiser Permanente Redwood City Medical Center, the San Jose Mercury News reported (

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