>The Late Upper Paleolithic Model, or Upper Paleolithic Revolution,

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>The Late Upper Paleolithic Model, or Upper Paleolithic Revolution, refers to the idea that, though anatomically modern humans first appear around 150,000 years ago, they were not cognitively or behaviorally "modern" until around 50,000 years ago, leading to their expansion into Europe and Asia.[6][17][18] These authors note that traits used as a metric for behavioral modernity do not appear as a package until around 40–50,000 years ago. Klein (1995) specifically describes evidence of fishing, bone shaped as a tool, hearths, significant artifact diversity, and elaborate graves are all absent before this point.[6] Although assemblages before 50,000 years ago show some diversity the only distinctly modern tool assemblages appear in Europe at 48,000.[17] According to these authors, art only becomes common beyond this switching point, signifying a change from archaic to modern humans.[6] Most researchers argue that a neurological or genetic change, perhaps one enabling complex language such as FOXP2, caused this revolutionary change in our species.[6][18

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