PHOENIX, Nov. 15 (UPI) -- Researchers say our human ancestors were making stone-tipped weapons in southern Africa 500,000 years ago, 200,000 years earlier than previously thought.
Researchers from Arizona State University, the University of Toronto and the University of Cape Town, working at the Kathu Pan 1 archaeological site, said they found evidence of "hafting," or attaching stone points to spears, considered an important advance in hunting weaponry for early humans.