Field studies of natural mammal populations present powerful opportunities to investigate
the determinants of health and aging using fine-grained observations of known individuals …

To date, most insights into the processes shaping vertebrate gut microbiomes have emerged
from studies with cross‐sectional designs. While this approach has been valuable, emerging …

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 …

This second edition reviews the new research findings and theoretical advances on fathers,
families, child development, programs, and policies that have occurred in the past decade …

Aging, for virtually all life, is inescapable. However, within populations, biological aging rates
vary. Understanding sources of variation in this process is central to understanding the …

Social status can have striking effects on health in humans and other animals, but the
causes often are unknown. In male vertebrates, status-related differences in health may be …

The male-female health-survival paradox—the phenomenon observed in modern human
societies in which women experience greater longevity and yet higher rates of disability and …

Abstract In 1963, Jeanne and Stuart Altmann traveled through Kenya and Tanzania
searching for a baboon study site. They settled on the Maasai-Amboseli Game Reserve …

The gut microbiome impacts host health and fitness, in part through the diversification of gut
metabolic function and pathogen protection. Elevations in glucocorticoids (GCs) appear to …

Early-life experiences can dramatically affect adult traits. However, the evolutionary origins
of such early-life effects are debated. The predictive adaptive response hypothesis argues …