Sexual maturation in humans is characterized by a unique individual variability. Pubertal
onset is a highly heritable polygenic trait but it is also affected by environmental factors such …

Puberty presents remarkable individual differences in timing reaching over 5 years in
humans. We put emphasis on the two edges of the age distribution of pubertal signs in …

Relatives have more similar gut microbiomes than nonrelatives, but the degree to which this
similarity results from shared genotypes versus shared environments has been …

Social relationships have profound effects on health in humans and other primates, but the
mechanisms that explain this relationship are not well understood. Using shotgun …

Events in primate evolution are often dated by assuming a constant rate of substitution per
unit time, but the validity of this assumption remains unclear. Among mammals, it is well …

In humans and other animals, harsh circumstances in early life predict morbidity and
mortality in adulthood. Multiple adverse conditions are thought to be especially toxic, but this …

For social species, the environment has two components: physical and social. The social
environment modifies the individual's interaction with the physical environment, and the …

The rate of adaptive evolution, the contribution of selection to genetic changes that increase
mean fitness, is determined by the additive genetic variance in individual relative fitness. To …

Are differences in hypothalamic-pituitary-adrenal (HPA) axis activation across the adult life
span linked to differences in survival? This question has been the subject of considerable …

The monitoring of endocrine markers that inform about an animal's physiological state has
become an invaluable tool for studying the behavioral ecology of primates. While the …