Add Yahoo as a preferred source to see more of our stories on Google. Howler infant number 5 on the back of a juvenile capuchin carrier, who is using stone tools at an anvil site in a stream bed.

On Jicarón Island in Panama’s Coiba National Park, a population of wild white-faced capuchin monkeys exhibits a striking and deeply perplexing new behavior: abducting infant howler monkeys. What began ...

Monkeys are our closest relatives in the evolutionary tree, are similar in all kinds of aspects, including one very important aspect that is- intelligence. Cognitive scientists, who study the ...