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The early fossil record of amphibians and their ancestors is largely fragmentary, which makes it difficult to understand how frogs, salamanders and their kin originated. Adding relatives like ...
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 ...
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