When Jacques Cousteau was young, an accident sent him on a path that led him to invent scuba, opening up the underwater world to humans. Today, explorers David Doubilet and Laurent Ballesta follow in his footsteps, making discoveries on their own amazing and sometimes terrifying adventures. For more information on this episode, visit nationalgeographic.com/overheard.  Want more? Learn more about Jacques Cousteau. From National Geographic Documentary Films, Becoming Cousteau is now streaming on Disney+. See more of Laurent Ballesta’s photographs, including an image he took of a grouper mating frenzy that recently won him the Wildlife Photographer of the Year award from the London Natural History Museum.  Also explore:  David Doubilet has been taking photos for Nat Geo for decades. If you want a list of his greatest hits, check out our article “32 Astonishing Photos of A Career Spent Underwater.”  And check out his new book out this month with some spectacular underwater images. It’s called “Two Worlds: Above and Below the Sea.” For subscribers:  For Nat Geo subscribers, you can also read about the time Laurent and a small crew of explorers spent 28 days living underwater in the Mediterranean Sea.   If you like what you hear and want to support more content like this, please rate and review us in your podcast app and consider a National Geographic subscription. That’s the best way to support Overheard. Go to natgeo.com/exploremore to subscribe. Learn more about your ad choices. Visit megaphone.fm/adchoices