Monkeys in Brazil 'have used stone tools for hundreds of years at least'

http://www.eurekalert.org/pub_releases/2016-07/uoo-mib070116.php

Public Release: 11-Jul-2016
Monkeys in Brazil 'have used stone tools for hundreds of years at least'
Was early human behavior influenced by their observations of monkeys using stone tools?
University of Oxford

New archaeological evidence suggests that Brazilian capuchins have been using stone tools to crack open cashew nuts for at least 700 years. Researchers say, to date, they have found the earliest archaeological examples of monkey tool use outside of Africa. In their paper, published in Current Biology, they suggest it raises questions about the origins and spread of tool use in New World monkeys and, controversially perhaps, prompts us to look at whether early human behaviour was influenced by their observations of monkeys using stones as tools. The research was led by Dr Michael Haslam of the University of Oxford, who in previous papers presents archaeological evidence showing that wild macaques in coastal Thailand used stone tools for decades at least to open shellfish and nuts.

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