Australia’s modern wildlife is extraordinary, but the continent’s ancient megafauna was even more remarkable, featuring rhino-sized wombat relatives and giant birds. Understanding how and why these animals vanished has long challenged scientists. We launched FosSahul 2.0, an improved, quality-rated fossil database that includes nearly 12,000 dated records. This transparent, open-access resource helps standardise fossil data, offering new insight into Australia’s ecological pa