ppers , ▁sc rap ers , ▁and ▁fla kes . ▁These ▁tools ▁were ▁manufact ured ▁from ▁locally ▁s our ced , ▁fine ▁gra ined ▁stone ▁such ▁as ▁bas alt ▁and ▁quart z ite . ▁D ating ▁to ▁about ▁ 1 . 7 ▁Ma , ▁the ▁D man isi ▁stone ▁tool ▁assemb lage ▁pred ates ▁the ▁earliest ▁evidence ▁of ▁A che ule an ▁b ifa cial ▁hand ax es , ▁which ▁first ▁appear ▁in ▁the ▁arch ae ological ▁record ▁around ▁ 1 . 6 ▁MA . ▁At ▁the ▁time ▁of ▁their ▁discovery , ▁they ▁were ▁some ▁of ▁the ▁oldest ▁stone ▁tools ▁to ▁be ▁found ▁outside ▁of ▁Africa . ▁Since ▁then , ▁ 2 . 1 ▁million ▁year ▁old ▁Old owan ▁tools ▁have ▁been ▁un cover ed ▁in ▁Shang chen , ▁China ▁which ▁pre date ▁the ▁D man isi ▁stone ▁tools , ▁providing ▁evidence ▁for ▁even ▁earlier ▁migr ations ▁outside ▁of ▁Africa . ▁ ▁E ight ▁fa unal ▁b ones ▁with ▁stone ▁tool ▁cut ▁marks ▁were ▁discovered ▁in ▁the ▁same ▁str atum ▁as ▁Sk ull ▁ 4 ▁( D 3 4 4 4 / D 3 9 0 0 ). ▁This ▁provides ▁strong ▁evidence ▁for ▁meat - e ating ▁at ▁the ▁site , ▁which ▁has ▁been ▁correl ated ▁to ▁large ▁home ▁range ▁size ▁and ▁more ▁extensive ▁log ist ical ▁mob ility . ▁It ▁has ▁been ▁suggested ▁that ▁the ▁introduction ▁of ▁meat ▁to ▁the ▁hom in in ▁di et ▁allowed ▁for ▁the ▁support ▁of ▁the ▁large ▁energy ▁costs ▁involved ▁in ▁increased ▁brain ▁and ▁body ▁size ,