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Freeman Dyson is dead; visionary and Renaissance physicist was 96 - The Washington Post

In 1947, Mr. Dyson journeyed to the United States to study as a graduate student at Cornell University, doing research under the physicist and future Nobel laureate Hans Bethe. He took a cross-country trip by car with a young, brilliant scientist named Richard Feynman. During this period, he spoke to, collaborated with or attended lectures by many other leading scientists, including Edward Teller, Julian Schwinger and J. Robert Oppenheimer.