In August 1969, Frank Oppenheimer dedicated his new Exploratorium in San Francisco primarily to interactive science exhibits that demonstrated principles in physics. The Exploratorium published the details of their own exhibits in "Cookbooks" that served as an inspiration to many other museums around the world, and since then has diversified into many outreach programs. Oppenheimer had researched European science museums while on a Guggenheim Fellowship in 1965. He noted that three museums served as important influences on the Exploratorium: the Palais de la Découverte, which displayed models to teach scientific concepts and employed students as demonstrators, a practice that directly inspired the Exploratorium's much-lauded High School Explainer Program; the South Kensington Museum of Science and Art, which Oppenheimer and his wife visited frequently; and the Deutsches Museum in Munich, the world's largest science museum, which had a number of interactive displays that impressed the Oppenheimers.