Table of Contents

THE ORIGIN OF THE SPECIES
Chris Stringer: The Out-of-Africa Hypothesis of Modern Human Origins
Paul Mellars: The Earliest Evidence of Cognitive Ability
Ian Tattersall: The Case for Saltational Events in Human Evolution
Mark Collard: Grades and Transitions in Human Evolution
LANGUAGE AND THE EVOLUTION OF THE BRAIN
Derek Bickerton: From Proto-language to Language
Detlev Ploog: Is the Neural Basis of Vocalisation Different in Non-Human Primates and Homo Sapiens?
Michael Corballis: Laterality and Human Speciation
James Steele: When did Directional ssymmetry Enter the Record?
Norman D. Cook: Bihemispheric Language: How the Two Hemispheres Collaborate in the Processing of Language
THE SEARCH FOR A CRITICAL EVENT
T. J. Crow: Sexual Selection, Timing, and the X-Y Homologous Gene: Did Homo Sapiens Speciate on the Y Chromosome?
Chris Tyler-Smith: What the Y chromosome can tell us about the origins of modern humans
Caroline Sargent, Patricia Blanco and Nabeel Affara: Do the Hominid-Specific Regions of X-Y Homology Contain Candidate Genes Potentially Involved in a Critical Event Linked to Speciation?
Klaus Reinhold: Preferential Sex Linkage of Sexually Selected Genes: Evidence and a New Explanation

Reviews

How did modern Homo sapiens originate and how do we differ from our closest relatives, living and extinct? This volume addresses these questions by bringing together contributions from 15 scientists in fields as diverse as human paleontologylinguisticshuman genetics, and evolutionary theory
*New Biology Books.*