Cousteau described his underwater world research in a series of books, perhaps the most successful being his first book, The Silent World: A Story of Undersea Discovery and Adventure, published in 1953. Cousteau also directed films, most notably the documentary adaptation of the book, The Silent World, which won a Palme d'or at the 1956 Cannes Film Festival. He remained the only person to win a Palme d'Or for a documentary film, until Michael Moore won the award in 2004 for Fahrenheit 9/11. Cousteau was born on 11 June 1910, in Saint-André-de-Cubzac, Gironde, France, to Daniel and Élisabeth Cousteau. He had one brother, Pierre-Antoine. Cousteau completed his preparatory studies at the Collège Stanislas in Paris. In 1930, he entered the École Navale and graduated as a gunnery officer. However, an automobile accident, which broke both his arms, cut short his career in naval aviation. The accident forced Cousteau to change his plans to become a naval pilot, so he then indulged his passion for the ocean. In Toulon, where he was serving on the Condorcet, Cousteau carried out his first underwater experiments, thanks to his friend Philippe Tailliez who in 1936 lent him some Fernez underwater goggles, predecessors of modern swimming goggles. Cousteau also belonged to the information service of the French Navy, and was sent on missions to Shanghai and Japan and in the USSR. On 12 July 1937 he married Simone Melchior, with whom he had two sons, Jean-Michel and Philippe. His sons took part in the adventures of the Calypso. In 1991, one year after his wife Simone's death from cancer, he married Francine Triplet. They already had a daughter Diane Cousteau (born 1980) and a son, Pierre-Yves Cousteau, born during Cousteau's marriage to his first wife. Cousteau is credited with improving the Aqua-Lung design which gave birth to the open-circuit scuba technology used today. According to his first book, The Silent World: A Story of Undersea Discovery and Adventure, Cousteau started diving with Fernez goggles in 1936, and in 1939 used the self-contained underwater breathing apparatus invented in 1926 by Commander Yves le Prieur. Cousteau was not satisfied with the length of time he could spend underwater with the Le Prieur apparatus so he improved it to extend underwater duration by adding a demand regulator, invented in 1942 by Émile Gagnan. In 1943 Cousteau tried out the first prototype Aqua-Lung which finally made extended underwater exploration possible.