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Defining the microanatomic differences between the human brain and that of other mammals is key to understanding its unique… Expand The article analyzes the neural and functional grounding of language skills as well as their emergence in hominid evolution… Expand Striding bipedalism is a key derived behaviour of hominids that possibly originated soon after the divergence of the chimpanzee… Expand Abstract Environmental theories of African faunal evolution state that important evolutionary changes during the Pliocene… Expand Proponents of the model known as the "human revolution" claim that modern human behaviors arose suddenly, and nearly… Expand The first part of this article describes a study of the relationships between personality and risk-taking in six areas: smoking… Expand Skin color is one of the most conspicuous ways in which humans vary and has been widely used to define human races. Here we… Expand Marine records of African climate variability document a shift toward more arid conditions after 2.8 million years ago (Ma… Expand The origin of living Homo sapiens has once again been the subject of much debate. Genetic data on present human population… Expand It has long been known that primate species differ greatly in the weight of their testes relative to body weight1. Recently it… Expand