boundary highly glaciated climate paleolithic period archaeology geologic pleistocene holocene boundary modern climate mesolithic epipaleolithic period archaeology neolithic period archaeology succession phases varies enormously one region culture another three age chronology paleolithic palaeolithic greek ''palaios'' old ''lithos'' stone lit old stone coined archaeologist john lubbock published earliest division stone age covers greatest portion humanity 's time roughly human technological history ref name thoth schick ref human humanity interpreted mean genus ''homo''
Humanities History Ancient history The Stone Age