As the polar ice melts, biologist and paleontologist Neil Shubin explores the contents within and uncovers mysteries in his book, "Ends of the Earth: Journeys to the Polar Regions in Search of Life, the Cosmos, and Our Future." Then, nature writer and professor David Gessner explores the story of the world’s most famous bird, Flaco, the Eurasian eagle-owl who escaped from Central Park Zoo and captured the hearts and imaginations of millions of followers around the world.