Melba Phillips, who grew up on a farm in Indiana at the turn of the 20th century, was one of J. Robert Oppenheimer’s first graduate students at the University of California, Berkeley. Together they discovered the Oppenheimer-Phillips Process, which explained a particular kind of nuclear reaction. In this episode, we explain what that is, with a little help from generative AI. Phillips did not follow Oppenheimer to Los Alamos, and was vocal in her opposition to nuclear weapons. During the McCarthy era, she lost her teaching job, and did not return to academia until 1957. In 1962, then in her mid-fifties, she finally became a full professor at the University of Chicago.