Cousteau and a team of aquanauts had made a world record by living undersea for 30 days in the
Conshelf underwater living experiment in 1963, CBS News reported.
Letters to parents and sister, and Memoir, IWM
Conshelf.
Cousteau also had another invention to his credit - the first underwater base camp
Conshelf I that could house working oceanauts for weeks at a time.