Bonus episode: The Secret Culture of Killer Whales

Scientists are discovering that killer whales, among the most social and intelligent of marine animals, have unique family structures and behaviors, passed from one generation to the next. National Geographic photographer Brian Skerry traveled the globe to document killer whale pods—where he found that diving with these special creatures can lead to strange and wonderful situations.  For more information on this episode, visit nationalgeographic.com/overheard. Want more? All four episodes of the Disney+ original series, Secrets of the Whales, from National Geographic, streams Earth Day, April 22 on Disney+. Join National Geographic’s Earth Day Eve celebration on Wednesday, April 21st at 8:30 pm EST, with a star-studded lineup of environmentally conscious musical artists, including Willie Nelson, Maggie Rogers, Yo-Yo Ma, Ziggy Marley, streamed on  NatGeo’s YouTube and NatGeo.com/EarthDayEve Also explore: Learn about orca behavior in our magazine piece, including orca greeting ceremonies and dialects. And read about Brian Skerry’s 10,000 hours underwater and find out why orca whales do poorly in captivity. If you like what you hear and want to support more content like this, please consider a National Geographic subscription. Go to natgeo.com/exploremore to subscribe today.  Learn more about your ad choices. Visit podcastchoices.com/adchoices