World's oldest-known animal cave art painted at least 40,000 years ago in Borneo

A number of caves in the Indonesian province of Kalimantan contain thousands rock art images of animals, hand stencils and symbols.  Sophisticated dating of the paintings shows the earliest paintings were created at least 40,000-52,000 years ago.  Paintings shifted from animals to humans at the peak of the Ice Age between 20,000-21,000 years ago.