Martin Williams is Emeritus Professor at the University of Adelaide, Australia. His particular contribution is the reconstruction of prehistoric environments, ranging from the habitats occupied by early hominids in the Afar Rift of Ethiopia to the Neolithic occupation in the Sahara and the Nile valley to the late Pleistocene wetlands in the arid Flinders Ranges of South Australia, using evidence from a wide variety of disciplines. He is a recipient of the Cuthbert Peek Medal from the Royal Geographical Society, the Sir Joseph Verco Medal from the Royal Society of South Australia, the Distingui...