div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Brilliant rock art and art rock in Australia src=https:reader031vdocumentsusreader031viewer20220204055750688b1a28ab0f07b0a64dhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1991 Nature Publishing Grouppdiv