Three tiny Purgatorius teeth found in Colorado are helping scientists trace how early primates evolved and spread across North America.

Sixty-six million years ago, a massive asteroid smashed into Earth. Life has undergone at least five mass extinctions in the last 500 million years, but this one particularly stands out. It wiped out ...

Tiny fossil teeth from Colorado are revealing new clues about the very first relatives of primates, including humans.

Learn how newly discovered Purgatorius fossils in Colorado’s Denver Basin are filling gaps in the Paleocene fossil record and ...

RANGELY, Colo. — University of Colorado Boulder announced Wednesday that a team of paleontologists working in the northwest corner of Colorado have discovered a "swamp dweller" that was alive during ...

New minuscule fossils of Purgatorius, the earliest-known relative of all primates—including humans—have been unearthed in a ...

A few teeth, smaller than a grain of rice, are changing the map of your earliest primate relatives. They come from a creature called Purgatorius, a tiny tree-dwelling mammal that lived about 66 ...

BOULDER, Colo. — Paleontologists recently discovered a rare mammal fossil in western Colorado. It's a genus of mammal that lived between 70 million and 75 million years ago and has never been seen ...

DENVER (KDVR) — Paleontologists unearthed a fossil in the northwest corner of Colorado and discovered a new mammal that lived when dinosaurs roamed the state millions of years ago. The team of ...

Getting your Trinity Audio player ready... Parking lot construction at Colorado’s Dinosaur National Monument unearthed new fossils last fall, the first discovery at the monument in more than 100 years ...