"A nearly-life-size depiction of a kangaroo " realistic genitalia included " is the oldest known rock painting in Australia. Scientists recently pinpointed its age to 17,300 years ago with a technique that had never been used on Australian ancient art before: measuring radioactive carbon in wasp nests from rocks near the artwork." " Live Science
SOURCE: ArtsJournal at 12:03PM on February 23, 2021