Friendship is the single most important factor influencing our health, well-being, and
happiness. Creating and maintaining friendships is, however, extremely costly, in terms of …

Many animals preferentially associate with certain other individuals. This social structuring
can influence how populations respond to changes to their environment, thus making …

In many mammals, females form close social bonds with members of their group, usually
between kin. Studies of social bonds and their fitness benefits have not been investigated …

The scientific study of networks-computer, social, and biological-has received an enormous
amount of interest in recent years. However, the network approach has been applied to the …

Fully updated revision of a classic text offering a thorough understanding of the normal
behavior of domestic animals The Seventh Edition of Domestic Animal Behavior for …

The epic story and ultimate big history of how human society evolved from intimate chimp
communities into the sprawling civilizations of a world-dominating species If a chimpanzee …

Comparative analyses are the backbone of evolutionary analysis. However, their record in
producing a consensus has not always been good. This is especially true of attempts to …

For reasons that are not yet clear, male aggression against females occurs frequently
among primates with promiscuous mating systems. Here, we test the sexual coercion …

Studying animal societies needs detailed observation of many individuals, but technological
advances offer new opportunities in this field. Here, we present a state-of-the-art drone …

Males generally exhibit reduced immune responses as well as increased intensity and
prevalence of infections compared to female conspecifics. Physiologically, these sex …