A search for dinosaur fossils unintentionally shifted into a discovery of the oldest tadpole ever discovered when a team ...

The discovery in Patagonia shows that frogs have had a tadpole stage for at least 160 million years. Here’s how the ancient frogs compare to those of today.

These subranges are defined by their own unique geographic features ... that you'll find Dinosaur National Monument. The monument is home to a wealth of dinosaur fossils and ancient petroglyphs ...