Archaeologists have revealed the first detailed studies of what some call one of the world's most significant collections of rock art, a treasure trove of more than 3,000 stunning paintings and other images spanning as many as 15,000 years.
The extraordinary cache lies in a remote and sparsely populated region of north-central Australia. Known by the Aboriginal name of Djulirri (rhymes with "Hillary"), the site was until now almost completely unknown to science.
The rock walls of Djulirri bear images of kangaroos, the now-extinct Tasmanian tiger, sailing ships from the 1800s, humans performing a ritual with a snake, European missionaries, even a biplane. In some places there are 20 layers of artworks, one painted atop the other.
The oldest paintings at the site are 12,000 to 15,000 years old; the newest, roughly 50.