The Inland Sea of Australia, also known as the Eromanga Sea, refers to a vast, ancient body of water that existed during the late Cretaceous period. This sea covered much of what is now the interior of Australia, providing a habitat for various marine life, including dinosaurs and ammonites. Today, the remnants of this ancient sea can be found in the form of sedimentary rock formations and fossil deposits scattered across the Australian landscape. The Great Artesian Basin, one of the largest underground water reservoirs in the world, is also linked to this historical sea, showcasing its lasting geological impact.