Modern humans' ancestors went through a Stone Age about 3 million years ago, marked by their use of stone to create tools for all kinds of purposes, from hunting to construction. And while other non-human species have been known to use stones as tools from time to time, the capuchin monkey has shown evidence of having a true Stone Age of its own, Science Newsreports.
The evidence comes from a study published in the journal Nature Ecology & Evolution this week. An archaeological site in Brazil uncovered stone tools used by capuchin monkeys from various times over the past 3,000 years. The capuchins' use of stone tools has actually changed over time, which is what makes it different from other primates' habits — over the course of the monkeys' Stone Age, as their environment has adapted, they've adapted their tools to suit their needs.
This doesn't necessarily mean that these little primates will eventually progress to their own Bronze Age and Iron Age like humans did, but it's still a remarkable find. Maybe with enough time, capuchins will find their own ways to evolve — and one day, inherit the Earth.