David Attenborough’s films for the BBC—impeccably researched, ambitiously filmed, and executed with style and imagination—have set a high bar for nature documentaries in our time. Over sixty years, his films have taught generations of us about the extraordinary diversity of life on the planet. His latest project is a seven-part survey of the world’s oceans, called “Planet Earth: Blue Planet II,” which débuts this week on BBC America. The series uses every technological advance, including drone-mounted and submersible cameras, to bring us closer to nature’s extremities. Attenborough talks with David Remnick about breaking precedent to give the film an overtly environmental message; about his determination at age ninety-one to keep working; and about the only creatures he really can’t stand. Plus, a look at how the Pulitzer Prize-winning poet Mary Oliver finds spiritual meaning in the natural world.