Eric Walker added A Natural Work of Art May Be Hiding Among Indian Cave Masterpieces - The New York Times and tagged it with Dickinsonia

Eric Walker added A Natural Work of Art May Be Hiding Among Indian Cave Masterpieces - The New York Times and tagged it with Madhya Pradesh

Eric Walker added Prehistoric bone etchings believed to be among oldest evidence of human use of symbols and tagged it with Origin of language

Eric Walker added Origin of language - Wikipedia and tagged it with Origin of language