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Frogs are commonly found in wet tropical forests today. More than a third of nearly 7,000 species of frog, in fact, live in wet forests. Fossil record, however, has little direct evidence to show a ...

A fragment of upper jaw fossil from the Early Cretaceous is among the oldest examples of a toothless amphibian in the fossil record Chihiro Kai The arid valleys of Wyoming’s Cloverly Formation are ...

The discoveries of two new species serve both to underscore the variety of fossils found at the Arkansas site, including dinosaurs, mammals, fish, amphibians and reptiles, and to reinforce the overall ...