http://merolinks.com/general-sciences/early-modern-humans-used-fire-to-engineer-tools-from-stone-complex-cognition-older-than-72000-years/ Evidence that early modern humans living on the coast of the far southern tip of Africa 72,000 years ago employed pyrotechnology – the controlled use of fire – to increase the quality and efficiency of their stone tool manufacturing process, is being reported in the Aug. 14 issue of the journal ... Fri, 14 Aug 2009 05:40:15 CDT en