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 ...

Sixty-six million years ago, a massive asteroid smashed into Earth. Life has undergone at least five mass extinctions in the ...

The tiny remnant belongs to Purgatorius, one of the earliest known relatives of all primates, including humans, which first ...

Tiny, tooth-sized fossils have just reshaped the story of our deepest ancestry. Paleontologists have discovered the southernmost remains ever found of Purgatorius—the earliest-known relative of all ...

This little critter hadn’t previously been identified south of Montana, but tiny, fossilized teeth show it had traveled into Colorado by around half a million years after the dinosaurs were wiped out.

An extinct relative of the howler monkey may have been the first leaf-eating primate in South and Central America ...

Fossils are rare because their formation and discovery depend on chains of ecological and geological events that occur over deep time. Only a small fraction of the primates that have ever lived has ...

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

Fossils show that howler monkey ancestors were eating leaves 13 million years ago, shaping body size and evolution.

Thirteen million years ago, a group of medium-sized monkeys known for guarding their territory among the treetops with fearsome "howls" started doing something new. These monkeys, among the oldest ...

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