Jacques Cousteau and Pierre-Antoine was released in 1954. During the 1940s, 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, "" (1953), 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
Alexandra Cousteau first went on expedition with her father, Philippe Cousteau and learned to scuba dive with her grandfather, Jacques-Yves Cousteau, when she was seven. Cousteau earned a Bachelor's degree in political science (International Relations) from Georgetown College in 1998. In May 2016, she received an honorary degree of Doctor of Humane Letters from Georgetown University, her alma mater. In 2000, Cousteau co-founded EarthEcho International with her brother Philippe Cousteau Jr. to further her family's legacy in science, advocacy, and education. From 2005 to 2007, Cousteau worked on ocean conservation issues in Central America as an advisor for MarViva. In 2010, Cousteau