Exceptionally preserved “dinosaur mummies” of the duck-billed Edmontosaurus have unveiled the first-known reptile hooves, offering unprecedented insights into their appearance. These remarkable ...

More than a century ago prolific fossil collector Charles Sternberg discovered the skeleton of a duck-billed Edmontosaurus dinosaur in the sandstone rocks of the Lance Formation in eastern Wyoming.

In the badlands of eastern Wyoming, the Lance Formation is a trove of prehistoric fossils. And one area in particular — a region less than 10 kilometers (6 miles) across — has provided scientists with ...