Hi, I'm Christina Hartman, and today About.com is profiling marine conservationist, explorer, inventor, and filmmaker, Jacques-Yves Cousteau.Jacques Cousteau was born in France on June 11, 1910. From an early age, Cousteau was fascinated with the sea and with gadgets. He learned how to swim when he was 4-years-old, and graduated from the French Naval Academy in 1933.In the 1940's, Cousteau helped invent the Aqua-Lung — the first successful self-contained underwater breathing device.In the 1950's, Cousteau turned an old minesweeper into a floating laboratory. Sailing on the Calypso, Cousteau carried out research expeditions around the world.In 1956, Cousteau directed his first film, called "The Silent World." It won an Academy Award for Best Documentary Feature. Cousteau would win another Oscar for Best Documentary in 1964 for "World Without Sun."Cousteau became famous to American audiences for his television series, "The Underwater World of Jacques Cousteau." Cousteau didn't just want to show people the ocean's beauty, but threats to it from pollution, overfishing, and development.Cousteau was an innovator throughout his life. He designed a diving saucer and underwater exploration vehicles. In 1985, he received the Presidential Medal of Freedom.Jacques Cousteau died on June 25, 1997, at the age of 87. Through his movies, books, and television documentaries, Cousteau took millions of people along on his undersea explorations.Thanks for watching our profile of ocean explorer, inventor, and filmmaker, Jacques Cousteau. For more information, check out About.com.