40.(A) Sophisticated dating techniques confirmed that the artifacts were made more than 70,000 years ago. (B) The artifacts were made of a reddish mineral known as iron ore stone ochre. (C) The creation of art is considered to be indicative of an advance in both the linguistic and cultural development of our human ancestors. (D) Also they could behave like modern humans much earlier than we previously believed possible. (E) The more recent discovery of Paleolithic art in a cave in South Africa is causing researchers to consider a less Euro-centric view of the origins of what is considered modern behavior.