But Oppenheimer vehemently—and repeatedly—denied ever being a member of the party or “a Communist Party unit.” Sometimes his denials were under oath. Who was telling the truth: Robert ...

Oppenheimer was also known to be involved in radical politics, specifically with several Communist Party affiliated groups and individuals. But he renounced such politics as he began work on the ...

The evidence of Oppenheimer’s membership in the Communist Party in the 1930s is ‘overwhelming,’ but it doesn’t mean he was a spy, says a retired Stanford history professor.

Unlike most other biographers, Monk takes Oppenheimer’s scientific concerns seriously. Quantum electrodynamics, he notes, had an “extraordinary hold” on Oppenheimer in the 1930s, and he quotes a ...

Oppenheimer's grandson, Charles Oppenheimer of Reno, said he preferred to focus on what had happened to his grandfather in the 1950s rather than the Communist issue.

J. Robert Oppenheimer, the father of the atomic bomb, lost his security clearance "through a flawed process that violated the Commission's own regulations," according to the Department of Energy.

A biographer of Robert Oppenheimer explains how he uncovered the likely truth about his membership in a secret communist unit.

The important point, Griffiths emphasized, was that while Robert Oppenheimer had been a secret communist, he was also, and always, a loyal American. As such, Oppenheimer was someone that FBI director ...

Robert Oppenheimer (1904-1967), American physicist, Director of the Manhattan project. Undated photograph, standing before blackboard, holding pipe. Credit - Bettmann Archive/Getty Images ...

Christopher Nolan’s blockbuster movie Oppenheimer has revived interest in the physicist popularly known as “the father of the atomic bomb.” Nonetheless, the subject of Nolan’s film remains ...