North Dakota

First adult T. rex trackway found in North Dakota

Paleontologists have uncovered the first known trackway left by a fully grown Tyrannosaurus rex — four massive, three-toed footprints stamped into what is now the Hell Creek Formation of southwestern North Dakota roughly 66.5 million years ago, on the geological…

First adult T. rex trackway discovered in North Dakota

A high school teacher's sharp eye in the North Dakota badlands has led to a once-in-a-lifetime paleontological discovery: the first trackway ever attributed to an adult Tyrannosaurus rex. The find, published on September 8 in the Journal of Vertebrate Paleontology,…