This transition from a larval to an adult stage involves significant morphological ... has appeared independently at several ...

Anuran amphibians (frogs and toads) have evolved a variety ... shift in spectral environment may constrain the evolution of visual protein networks. However, other tadpoles develop in scotopic ...

While searching for dinosaur fossils in Argentina, paleontologists accidentally discovered the fossil of a giant ancient ...

The African clawed frog is used as a model organism for biological research because of its close evolutionary relationship to humans, and because early development occurs externally, allowing ...

The African clawed frog is used as a model organism for biological research because of its close evolutionary relationship to humans, and because early development occurs externally, allowing ...

The African clawed frog is used as a model organism for biological research because of its close evolutionary relationship to humans, and because early development occurs externally, allowing ...

There definitely were no muppets during the Permian Period, but there was a Kermit – or at least a forerunner of modern amphibians that has been named after the celebrity frog. Scientists on ...