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8-6 mya
probable common ancestor of chimps and humans
~4 mya
emergence of first australopithecines
2.5 mya
emergence of first proposed Homo species, H. habilis-Associated with
encephalization and first tools (Oldowan tradition)
2.0 mya
emergence of H. erectus/ergaster in Africa, first hominins outside of Africa (H.
erectus)-Acheulean tools, likely controlled fire
6
400 kya
Archaic humans in Africa, Europe, and Asia (Levallois tool technique)
~130 kya – 30 kya
Classic Neandertals in Europe and SW Asia
315 kya
Anatomically modern humans first appear in Africa
45 kya
Anatomically modern humans appear in Europe
Trend in stone tools towards greater efficiency—more cutting edge per pound of raw
material (stone) with each new tradition or technique.