Exploratorium

This guide to the Exploratorium in San Francisco follows physicist Frank Oppenheimer, who in 1949 admitted before Congress that he had once been a Communist and lost his university career for it. It traces what he did next: years running a cattle ranch in Colorado, then a rediscovery teaching high school science that changed how he thought people actually learn. Reach out and turn a crank or watch light bend at the exhibit nearest you as you listen.