We know whales as graceful giants bound to the sea. But what if we told you there was actually a time when whales could walk. Signup for your FREE trial to The Great Courses Plus here: http://ow.ly/x0Hi30egd4K Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios The Great Courses Plus is currently available to watch through a web browser to almost anyone in the world and optimized for the US market. The Great Courses Plus is currently working to both optimize the product globally and accept credit card payments globally. Want to follow Eons elsewhere on the internet? Facebook - https://www.facebook.com/eonsshow Twitter - https://twitter.com/eonsshow Instagram - https://www.instagram.com/eonsshow/ References: http://web.neomed.edu/web/anatomy/Thewissen/whale_origins/index.html https://www.researchgate.net/publication/255721304_Ambulocetus_natans_an_Eocene_Cetacean_Mammalia_from_Pakistan https://link.springer.com/article/10.1007/s12052-009-0135-2