In nontechnical language, Human Evolution traces the development of our ancestors through time from the primate Aegyptotithecus, which lived thirty million years ago, to the emergence of modern humans. The text contains extensive descriptions based on fossil evidence of various ancestral groups, where and when they lived, their adaptations to their environment, differences between groups, and how groups were related. Each description is brought to life with a painting by Maurice Wilson reconstructed from the fossil evidence of not only the group concerned but also of the plants and other animals alive at that time.