Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

Research by UCLA life scientists and 50 colleagues sheds new light on the biological differences among more than 150 species of monkeys in South America, many of which are endangered. Their findings ...

Some 18 million years ago, a tiny monkey weighing little more than a baseball lived in the Amazon rainforest, the smallest fossil monkey known worldwide. The finding is based on a single tooth, twice ...

Scientists have detected microplastics in the digestive systems of red howler monkeys living in protected areas in the Brazilian Amazon, marking the first evidence of plastic ingestion by a ...

Deep in the Amazon rainforest, a new species of fluff-covered monkey had been hiding in plain sight, disguised as similar species that we already knew about. The newly named Plecturocebus parecis was ...

A group of fluffy grey monkeys living in the Amazon rainforest belong to a new species. They were first spotted by biologists a century ago, but have only now been recognised by scientists as a ...

A Chilean tourist survived for nine days while lost in a dense expanse of Bolivian rainforest — thanks to a troop of hero monkeys who “dropped him fruit and led him to shelter and water every day,” ...

From the riverbed of the Río Alto Madre de Dios in southeastern Peru, researchers have found an extremely small tooth that belonged to a species of tiny monkey that lived some 18 million years ago.