ScienceEast Africapaleoanthropologytoolmaking science-360-6384-east-africa-stone-age-toolmaking Chronology of the Acheulean to Middle Stone Age transition in eastern Africa The origin of the Middle Stone Age (MSA) marks the transition from a highly persistent mode of stone toolmaking, the Acheulean, to a period of increasing technological innovation and cultural indicators associated with the evolution of Homo sapiens. By Richard Potts, et al. Mar 14th, 2018 Previous Next