Considerable evidence suggests that the steroid hormone testosterone mediates major life-
history trade-offs in vertebrates, promoting mating effort at the expense of parenting effort or …

Extensive research has established that fathers' engagement in parenting benefits children,
but few studies have described how fathers contribute to child development even before …

The self-domestication hypothesis suggests that, like mammalian domesticates, humans
have gone through a process of selection against aggression–a process that in the case of …

Humans are unique in their sophisticated culture and societal structures, their complex
languages, and their extensive tool use. According to the human self-domestication …

Human paternal behavior is multidimensional, and extant research has yet to delineate how
hormone patterns may be related to different dimensions of fathering. Further, although …

The Ape that Understood the Universe is the story of the strangest animal in the world: the
human animal. It opens with a question: How would an alien scientist view our species …

Esports, or competitive video gaming, has rapidly increased in online play and viewing. The
popularity of esports such as League of Legends may derive in part because it features skills …

Abstract The Challenge Hypothesis (Wingfield et al., 1990) originally focused on adult male
avian testosterone elevated in response to same-sex competition in reproductive contexts …

Mating strategy theories assert that women's preferences for androgen dependent traits in
men are stronger when the costs of reduced paternal investment are lowest. Past research …

Understanding the neurobiology of social bonding in non-human primates is a critical step in
understanding the evolution of monogamy, as well as understanding the neural substrates …