17,300-year-old kangaroo identified as Australia's oldest rock painting

File photo taken on July 7, 2016 shows researchers recording a painting of a kangaroo in Kimberley region, Australia. A two-meter-long painting of a kangaroo in Western Australia's Kimberley region has been recognized as Australia's oldest intact rock painting, dating back 17,300 years. Naturalistic depictions of animals are a common subject for the world's oldest dated rock art. In a paper published in Nature Human Behavior on Tuesday, a research team led by the University of Melbourne used the radiocarbon dating of 27 mud wasp nests from 16 similar paintings in Kimberley to identify the one that features kangaroo as the oldest dated in-situ rock painting so far. (Photo by Peter Veth/Xinhua)