Argues that there has been a variety of species in the development of the human, and that their extinction may have promoted the progress of homo sapiens, the human form that survives today.
Examines the genetics that dictate the differences between men and women and includes discussions on the differences in psychology and physical attributes.
Examines theories of human evolution which disclose how early man confronted the predatory dangers of his world and often fell victim to being eaten by wild dogs, snakes, crocodiles, and even some birds.
Explores the future of the Y chromosome and discusses how many years from now it may become extinct. Traces the natural history of the Y chromosome and examines the physical, genetic, psychological, and social differences between males and females.
Describes the discovery in Africa of a nearly complete skeleton of a teenage male that may represent the "missing link" between apes and modern humans and provides a step-by-step analysis of the find and its significance.
