A monkey descending a tree trunk often keeps its head up, moving almost like a cautious climber backing down a ladder.

A new study explains how climbing down trees helped shape upright posture in early primates and changed the course of evolution.

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 ...

WASHINGTON — One of the earliest primates lived in trees and relied more on smell than vision, a new study indicates. A tiny cousin of the earliest ancestors of humans lived 54 million years ago in ...

Learn about the different ways mammals descended from trees and what this can tell us about early primate evolution.

This photograph shows two species from the study by Toussaint et al. – a raccoon (Procyon lotor) and mongoose lemur (Eulemur mongoz) – climbing on vertical supports. Researchers have shed new light on ...

The note cards and images document trees and primates observed by Suzanne Ripley during 1966 - 1971. Images are organized by plant and primate, then by binomial. Each binomial includes a series of ...

Researchers have shed new light on the features that enable tree-dwelling mammals to move effectively through their environments, providing insights into the evolution of the distinct upright postures ...