Literature in evolutionary psychology suggests that mate choice has been the primary
mechanism of sexual selection in humans, but this conclusion conforms neither to …

Following Darwin's original insights regarding sexual selection, studies of intrasexual
competition have mainly focused on male competition for mates; by contrast, female …

Asymmetry of the brain and behaviour (lateralization) has traditionally been considered
unique to humans. However, research has shown that this phenomenon is widespread …

We describe a Bayesian method for investigating correlated evolution of discrete binary
traits on phylogenetic trees. The method fits a continuous-time Markov model to a pair of …

We review evolutionary processes and mechanisms that gave rise to the diversity of primate
social systems. We define social organization, social structure and mating system as distinct …

Why do people resort to plastic surgery to look young? Why are stepchildren at greatest risk
of fatal abuse? Why do we prefer gossip to algebra? Why must Dogon wives live alone in a …

Coloration is a diagnostic tool for identifying mammals, but inquiry into its function has lain
dormant for almost a century. Recently, the topic has been revived and modern phylogenetic …

In many nonhuman primates, the color red enhances males' attraction to females. In 5
experiments, the authors demonstrate a parallel effect in humans: Red, relative to other …

Color is a ubiquitous perceptual stimulus, yet relatively little empirical and even less
theoretical work exists on color and psychological functioning. The research that has been …

Sexual dimorphism is a pervasive phenomenon among anthropoid primates. Comparative
analyses over the past 30 years have greatly expanded our understanding of both variation …