CAPE TOWN, SOUTH AFRICA—Tens of thousands of Earlier Stone Age artifacts have been discovered at an archaeological site at Kathu in the Northern Cape province of South Africa by archaeologists from the University of Cape Town, the University of Toronto, and the McGregor Museum in Kimberley, South Africa. The site, which is estimated to be between 700,000 and one million years old, is located in a major mining center and development zone. “We need to imagine a landscape around Kathu that supported large populations of human ancestors, as well as large animals like hippos. All indications suggest that Kathu was much wetter, maybe more like the Okavango than the Kalahari. There is no question that the Kathu Complex presents unique opportunities to investigate the evolution of human ancestors in Southern Africa,” Michael Chazan of the University of Toronto told Science Daily.