Lower PP5-6 Archaeological Section (image) Arizona State University Caption Stratigraphic layers visible in this lower section of the PP5-6 archaeological site of the South African Coast Paleoclimate, Paleoenvironment, Paleoecology, Paleoanthropology Project (SACP4) site at Pinnacle Point, Mossel Bay, date to 79,000 to 86,000 years ago. The site is where an international team of researchers discovered evidence that early modern humans employed pyrotechnology to increase the quality and efficiency of their stone tool manufacturing process, as reported in the Aug. 14 issue of the journal Science. Credit Photo by Simen Oestmo/South African Coast Paleoclimate, Paleoenvironment, Paleoecology, Paleoanthropology Project (SACP4) Usage Restrictions with proper credit Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.