Have you ever wondered why our bodies look the way they do? In this three part series, paleobiologist Neil Shubin sets out to find the answers in a surprising place: the ancient animal ancestors that shaped our anatomy. In Your Inner Fish , he and his colleagues discover a fossilized fish, known as Tiktaalik, that had enough strength in its front fins to heave itself out of the water 375 million years ago. Remarkably, we can trace the ancestry of our own hands and arms back to these fins. Viewers also meet the scientists who discovered the DNA recipe for constructing the human hand - an essential gene shared today with a surprising number of other animals.

Films on Demand is distributed by Films Media Group for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware. Encoded with permission by Films Media Group on November 24, 2014.