Paleontologists have uncovered new fossils from Tiktaalik roseae, which, while still a fish, is considered a transitional fossil that also has traits common to the first four-footed animals.
MORE: http://www.washingtonpost.com/national/health-science/fossil-reveals-transitional-link-from-fins-to-feet/2014/01/13/b02100c6-7a3a-11e3-8963-b4b654bcc9b2_story.html
