If you viewed the 3-part PBS series on Your Inner Fish, then you have already been introduced to the tetrapod that captures the transition of life moving from water on to land.  This fossil specimen, classified as the Tiktaalik roseae, is temporarily housed at the Academy of Natural Sciences of Drexel University in Philadelphia, PA.  To learn more about the Tiktaalik roseae, visit our online collection of resources relating to the book and mini-series.