Crews captured an incredibly rare scene—the birth of a humpback whale—while filming for "Incredible Animal Journeys." The encounter also revealed mysterious behavior from nearby males who enveloped the new mother in bubbles. These humpback whales will need to travel 3,000 miles with a newborn in tow in order to reach their usual feeding grounds in Alaska. Read more about this incredible scene: https://on.natgeo.com/49Gn6DJ #IncredibleAnimalJourneys, narrated by Jeremy Renner, premieres Sunday, N