Deep beneath Australia’s Nullarbor Plain lies Koonalda Cave. Lakes can be found within its subterranean passages, a matter of no little import in this vast semi-arid landscape. But it was not just water that drew people into its depths. Flint nodules provided easy access to a valued raw material, while the walls of the cave presented a canvas for rock art. In our cover feature, we question what these markings could mean, and examine the history of research at the site. At Tell Nabasha, in E...