A long record of ancient stone tools could tell us if the monkeys picked up tool use in response to an environmental stress, such as rapid sea level changes, for example. (newscientist.com)
The digital collection of animals, human ancestors, as well as ancient stone tools offers a unique tool for scholars and enthusiasts to explore and interact with the collection online. (africanfossils.org)
A grand and ancient stone wall lined one side of that road and the other side was covered with rolling vineyards. (theexpeditioner.com)