Deborah Giles(link is external), research scientist at the UW Center for Conservation Biology(link is external), tells the story of the orca Tahlequah and what researchers learned about orcas with the help of a scat-detecting dog named Eba, on a new series Discovery Channel series, "The Earthshot Prize: Repairing Our Planet," which focuses on five major challenges facing the planet.

Watch the video clip here.(link is external)