The Kimberley was one of the earliest settled parts of Australia, with the first humans landing about 41,000 years ago. They created a complex culture that developed over thousands of years. Yam ("Dioscorea hastifolia") agriculture was developed, and rock art suggests that this was where some of the earliest boomerangs were invented. The worship of Wandjina deities was most common in this region, and a complex theology dealing with the transmigration of souls was part of the local people's religious philosophy.