Willy Ley, born in Berlin, Germany, in 1906, later became an American science writer. Willy Ley studied zoology and other sciences before taking an interest in rocketry. His first book, published in 1926, popularized Hermann Oberth. A founding member of the German spaceflight society, he advised filmmaker Fritz Lang, who was producing a pioneering space fiction film in 1929. To escape the Nazis, Ley emigrated in 1935 to the United States, where he became a famous science writer and space travel promoter.