Haunted by His Brother, He Revolutionized Physics.

Time. As a physicist, Wheeler had always been curious to untangle the nature of that mysterious dimension.

The postcard contained only two words: “Hurry up.” John Archibald Wheeler, a 33-year-old physicist, was in Hanford, Wash., working on the nuclear reactor that was feeding plutonium to Los Alamos, when he received the postcard from his younger brother, Joe. It was late summer, 1944. Joe was fighting on the front lines of World War … Read more

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