The museum's new exhibit included a nearly complete oreodontid skeleton that attracted crowds.

Although oreodontids were once abundant across North America, their fossils now provide only scattered glimpses of a long-lost ecosystem.

At the dig site, the team uncovered a nearly complete oreodont skeleton that reshaped their understanding of North American fauna.

Paleontologists debated whether oreodonts preferred open grasslands or mixed woodlands.