supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA05130202);the Knowledge Innovation Program of the Chinese Academy of Sciences(KZCX2-YW-Q1-04);the Special Basic Research Project(2007FY110200);the National Basic Research Program of China(2010CB950203)
Cognition and symbolic thinking are viewed as important features of modern human behavior.Engraved objects are seen as a hallmark of cognition and symbolism,and even as evidence for language.Accumulated evidences incl...