OTTAWA—A 375-million-year-old fossil of a primitive fish that also sports features of the first four-limbed creatures is now in the hands of the Canadian Museum of Nature, the museum announced Tuesday.
The transitional fossil, known as Tiktaalik, has a flat head and a neck like tetrapods but also has fins, scales and gills like fish. Its discovery is said to have dramatically advanced our understanding of the evolution of finned to limbed animals.
