Sulawesi's cave art and the origins of storytelling

In 2012, the discovery of rock art in caves on the Indonesian island of Sulawesi changed our understanding of early human history.
Archaeologist Maxime Aubert tells Leo Dunlop how his team used a new dating technique to reveal that some of the cave paintings were tens of thousands of years older than previously thought.
This challenged long-held ideas that art and storytelling originated in Western Europe.