Watch as these juvenile Emperor penguins take a leap of faith, on their way to the ocean without their parents for the first time. Over two extraordinary years, National Geographic Explorer Bertie Gregory discovers secret traditions, surprising intelligence and close-knit societies of penguins from Antarctica to the Galápagos, never filmed before. Watch Secrets of the Penguins this Earth Day. Tuesday April 22nd from 7pm, on National Geographic WILD UK. Also streaming on Disney | National Geograp