Add Yahoo as a preferred source to see more of our stories on Google. An artist's illustration shows Deinosuchus riograndensis swimming with an early alligator relative in the wetlands of the Western ...

BOULDER, Colo. — Paleontologists recently discovered a rare mammal fossil in western Colorado. It's a genus of mammal that lived between 70 million and 75 million years ago and has never been seen ...

Rare fossils uncovered in Colorado show an unexpected swamp-dwelling creature lived among the dinosaurs millions of years ago. A team of paleontologists uncovered the “new (or, more accurately, very ...

Photograph of Acronichthys maccagnoi fossil (with scale), which was located well inland from the shoreline of the Western Interior Seaway Disclaimer: AAAS and EurekAlert! are not responsible for the ...