In this video segment from NOVA: "Judgment Day: Intelligent Design on Trial," paleontologist Neil Shubin recounts a fossil discovery that added another compelling piece to the body of evidence that supports evolution. Shubin's find of a well-preserved skeleton, a "fishapod," represents a transitional fossil. Transitional fossils help scientists bridge gaps in the tree of life, resulting in a picture of gradual evolution over millions of years.

This video is available in both English and Spanish audio, along with corresponding closed captions.