Kermitops with Kermit the Frog (IMAGE) Smithsonian Caption Arjan Mann (right), a Smithsonian postdoctoral paleontologist and former Peter Buck Fellow, and Calvin So (left), a doctoral student at George Washington University, holding the fossil skull of Kermitops in front of the Kermit the Frog puppet display in the “Entertainment Nation” exhibition at the National Museum of American History. Scientists have uncovered the fossilized skull of a 270-million-year-old ancient amphibian ancestor in the collection of the Smithsonian’s National Museum of Natural History. In a paper published today, March 21, in the Zoological Journal of the Linnean Society, the team of researchers described the fossil as a new species of proto-amphibian, which they named Kermitops gratus in honor of the iconic Muppet, Kermit the Frog. Note: Fossil skull of Kermitops; USNM PAL 407585, Department of Paleobiology, Smithsonian Institution. Note: Kermit the Frog puppet; 1994.0037.01, Gift of Jim Henson Productions. From the collections at National Museum of American History, Smithsonian Institution. Credit James D. Tiller and James Di Loreto, Smithsonian. Usage Restrictions News media use of the photos in relation to the study is only permitted with attribution. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.