The evolutionary journey from primitive plesiadapiforms to early primates during the Paleocene and Eocene epochs represents a critical chapter in mammalian history.

Learn more about the discovery of a giant possum in Big Bend National Park and how it’s connected to early primate evolution.

Kristen Miller, lead author of the study and a doctoral student at KU’s Biodiversity Institute, analyzed the Texan fossils to ...

They’re not, technically speaking, primates, but they're very close to the ancestry of living and fossil primates. These marsupials are probably ecological analogues of early primates.

University of Kansas paleontologists discover giant hedgehog-sized marsupial relative from Paleocene Texas fossil collections ...

During the early Paleocene, about 66 to 56 million years ago, a species of small mammal known as Mixodectes pungens inhabited western North America. It was first discovered more than 140 years ago ...

A newly described ancient mammal discovered in Texas is turning heads—not just for its size, but for what it reveals about ...

Paleontologists have found fossilized remains of a giant possum-like mammal that lived 60 million years ago. The fossils, found at Big Bend National Park in Texas, belong to a group of ancient ...

They say everything's bigger in Texas. And that appears to be true, at least in the case of a group of ancient near-marsupials scientists call Swaindelphys.

These marsupials are probably ecological analogues of early primates." STOCK IMAGE/Getty Images - PHOTO: In this undated file photo, the Chisos Mountains are shown in Big Bend National Park.