A group of white-faced capuchin monkeys in Panama has begun using stone tools to feed themselves, thus entering their own Stone Age. They’re the second group of monkeys that researchers have observed using tools in the past two years, providing intriguing insights into humans’ own evolution.
The Panamanian group lives on the small island of Jicarón, which is part of Coiba National Park. One group of monkeys is particularly adept with its stones, using them to crack open coconuts, snails, and nuts. Researchers first reported the Jicaron monkeys’ use of stone tools in 2004, but a team returned to the island in 2017 to record and document their findings.