Archaeologists have discovered the world’s oldest known animal cave painting in Indonesia: a wild pig believed to be drawn some 45,500 years ago. The picture was found in the Leang Tedongnge cave in a remote valley on the island of Sulawesi and provides the earliest evidence of human settlement in the region. A archaeological dating specialist, Mr. Aubert, had identified a calcite deposit that had formed on top of the painting and used Uranium-series isotope dating to determine that the deposit was 45,500 years old. That makes the work at least that old, but according to Aubert, it could be much older. The area where the painting was found is believed to have been a stepping stone for modern humans as they made their way to Australia, which raises the prospect that the area may hold more cave paintings that could be even older.