A cave painting on an Indonesian island is believed to be the oldest known evidence of storytelling in art, researchers said on Thursday. Scientists from Australia’s Griffith University, the Indonesian National Research and Innovation Agency (BRIN) and Southern Cross University discovered and dated a cave painting on the Indonesian island of Sulawesi. The painting, located in a limestone cave, depicts three human-like figures interacting with a wild pig. Scientists analysed tiny layers of calcium carbonate that had formed on top of the art to determine its age. The results found the artwork wa…