Lake Mungo find more evidence for the "out of Africa" theory. The rich archaeological heritage of the site is very significant to the Aboriginal Australian people from the area. The Willandra region is inhabited by the Barkindji, Nyiampaa and Mutthi Mutthi peoples, who have now entered Joint Management Agreements with the Government of New South Wales to manage the lake and the Mungo National Park. In 1972, Archaeomagnetic studies were conducted on the prehistoric aboriginal fireplaces occurring along the ancient shoreline of Lake Mungo. Magnetization preserved in oven-stones and baked hearths show that the axial dipole field moved up to 120 degrees
Belair National Park in January 1892. Another person given partial credit was William Henry Selway of the Field Naturalists' Section of the Royal Society. In 1985, the Belair National Park was declared as a state heritage area under the "South Australian Heritage Act 1978-1980". In 1987, the nearby National Park railway station was closed. The first European people traversed the Belair area in 1837. In 1840, Governor Gawler raised a government farm on which sick horses and bullocks from government departments could be agisted. In 1881, a proposal was put forward for small agricultural holdings and also, the national park was dedicated, making