The importance of locomotion to evolutionary fitness has led to extensive study of primate
locomotor behavior, morphology and ecology. Most previous research has focused on adult …

In this paper I review the literature on the evolutionary origins of phobias and describe the
current state of research on the neurobiology and developmental origins of ophidiophobia …

Sweating is an unusual thermoregulatory strategy for most mammals, yet is critical for
humans. This trait is commonly hypothesized to result from human ancestors moving from a …

This paper continues our previous study in which we examined the respondents' reaction to
two morphologically different snake stimuli categories–one evoking exclusively fear and …

Ecological research often assumes that species are adapted to their current climatic
environments. However, climate fluctuations over geologic timescales have influenced …

Background Based on evolutionary patterns of the vertebrate eye, Walls (1942)
hypothesized that early placental mammals evolved primarily in nocturnal habitats …

Primates and other mammals show measurable, heritable variation in behavioral traits such
as gregariousness, timidity, and aggression. Connections among behavior, environment …

Reddish pelage and red hair ornaments have evolved many times, independently, during
primate evolution. It is generally assumed that these red‐coat phenotypes, like red skin …

Allomaternal care is a rare, though phylogenetically widespread, mammalian infant care
strategy. Among primates, the effects of allomaternal care are marked; its presence …

Adam Wilkins draws on studies of nonhuman species, the fossil record, genetics, and
molecular and developmental biology to reconstruct the evolution of the human face and its …