The creatures, which ranged in size from that of a fox to more than 50 feet long, divided their time between the coast and ...

In 2015, paleontologists unearthed a new mosasaur species, Jormungander walhallaensi, in North Dakota. This 24-foot-long "sea dragon" lived 80 million ...

Tyrannosaur fossils show the animals squared off and bit each other in the face. Illustration by Emily Lankiewicz / Zissoudisctrucker via Wikipedia under CC BY-SA 4.0 / Public Domain Part of our ...

A creature that scuttled along the seafloor 450 million years ago has been preserved in a rare and striking fossil that formed in fool’s gold.

The anatomy of a Chinese fossil offers a hint that birdsong may be as old as the dinosaurs themselves.

The Denver Museum of Nature and Science made a surprise discovery during a project on the museum's parking lot: a 70 million-year-old dinosaur fossil.