In his new book, ‘Deep’, James Nestor delves into the wild world of freediving, where swimmers plunge up to -700 feet on one breath. In this excerpt from the book, Nestor documents his first ...

During my week at the World Freediving Championships, divers kept telling me I should start training and try it myself someday. So I did start—with an out-of-the-water session on breath-holding—and it ...