Alexander K. Hill

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In many primates, including humans, the vocalizations of males and females differ dramatically, with male vocalizations and vocal anatomy often seeming to exaggerate apparent body size. These traits may be favoured by sexual selection because low-frequency male vocalizations intimidate rivals and/or attract females, but this hypothesis has not been(More)
a Department of Anthropology, Pennsylvania State University, University Park, PA 16802 b Centre for Ecology and Conservation, School of Biosciences, University of Exeter, Penryn, UK c Department of Psychology, Oakland University, Rochester, MI 48309 d Department of Psychology, Pennsylvania State University, University Park, PA 16802 e Center for Brain,(More)
Previous studies have used self-ratings or strangers' ratings to assess men's attractiveness and dominance, attributes that have likely affected men's access to mates throughout human evolution. However, attractiveness and dominance include more than isolated impressions; they incorporate knowledge gained through social interaction. We tested whether(More)
Across human societies and many nonhuman animals, males have greater interest in uncommitted sex (more unrestricted sociosexuality) than do females. Testosterone shows positive associations with male-typical sociosexual behavior in nonhuman animals. Yet, it remains unclear whether the human sex difference in sociosexual psychology (attitudes and desires) is(More)
H sperm are approximately 6000th of a centimeter long, a small fraction of a man’s total body length. By contrast, fruit fly (Drosophila spp.) sperm can reach nearly 6 cm, roughly twenty times the total length of their bodies. This dramatic variation in male reproductive biology is explored in a recent paper from the journal Nature.1 While the literature on(More)
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