By contrast, industries are defined by basic elements of lithic production which may have been used by many unrelated human groups over tens or even hundred thousands of years,[1] and over very wide geographical ranges. Sites producing tools from the Acheulean industry stretch from France to China, as well as Africa. Consequently, shifts between lithic industries are thought to reflect major milestones in human evolution, such as changes in cognitive ability[4] or even the replacement of one human species by another.[5] However, findings from ancient DNA studies describe several changes and periods of stasis in European populations that are not strongly reflected in the current cultural taxonomic frameworks.[6] Therefore, artefacts from a single industry may come from a number of different cultures.