Add Yahoo as a preferred source to see more of our stories on Google. A new fossil study confirms that a smaller tyrannosaur once lived beside T. rex, changing how we see the dinosaur world and the ...

Scientists identified a fossil from New Mexico as belonging to a dinosaur that may have been an ancestor of the Tyrannosaurus Rex.

A groundbreaking study of Tyrannosaurus rex fossils has rewritten what humans know about these prehistoric predators and how long they lived millions of years ago. A study by three US researchers ...

When you look at a fossil on display, you may envision the world 66 million years ago. You might feel the earth shake beneath you as a large predator stalks the ancient floodplain. It has long, sharp ...