Looking for Killer Whales 26 Years After the Exxon Valdez Oil Spill (Part 1)

January 25, 2016 - In the first segment of a three-part investigation, National Geographic travels to Prince William Sound in Alaska to meet with researchers who are studying the lingering effects of the catastrophic Exxon Valdez oil spill on the local orca population.

Watch Part 2 of the investigation

Watch Part 3 of the investigation

Read more about the Chugach orca pod in Alaska