For this episode we speak with Jim Darling, a marine biologist whose team found that the songs of different humpback whale groups can be so similar to each other that the conventional wisdom of these being distinct groups might be wrong. These whales may be sharing and singing each others' songs across groups and regions, he thinks. Darling joins the show to play recordings of these remarkably similar humpback whale songs and discuss the implications. Please invite your friends to subscribe to this show via Android, Apple Podcasts, Google Podcasts, Stitcher, TuneIn, Spotify, Pandora, or wherever they get podcasts. Visit www.patreon.com/mongabay to pledge a dollar or more to keep this show growing, Mongabay is a nonproft media outlet and all support helps! See our latest news from nature's frontlines at Mongabay's homepage: news.mongabay.com or find us on Facebook, Twitter, and Instagram by searching for @mongabay. Feedback is welcome: submissions@mongabay.com.