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 ...

Camera trap footage of a white-faced capuchin monkey from Isla Jicarón, Coiba National Park, Panama. Some groups of capuchins in the park have begun using stone tools, which may give insight into how ...

Key Facts 13.3-million–13.6 million-year-old fossils from an extinct relative of the howler monkey show signs of being the first leaf-eating ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Once found in the jungles of Africa, researchers in South ...

Learn why some primates consume mushrooms, a dietary decision that our ancient hominin ancestors may have also chosen.

Cover -- Contents -- List of Illustrations -- Preface -- CHAPTER 1. What Is a New World Monkey? -- What is a monkey? -- What is a platyrrhine? -- Platyrrhines and catarrhines -- Platyrrhine taxonomy - ...

A stone tool found in the sand has always been considered the handiwork of early humans and their ancestors. But a remarkable discovery in a Brazilian forest suggests that might not be so. Scientists ...