In this episode, Xavier Bonilla has a dialogue with Sarah B. Hrdy about a natural history of fathers. They discuss fathers as caregivers, different roles, role of prolactin with male care, decrease of testosterone in new fathers, alloparenting, grandmother hypothesis, attachment in fathers, fatherhood in the 21st century, and many more topics.

Sarah B. Hrdy is an anthropologist and primatologist who is professor emerita at the University of California-Davis. She has her PhD in Anthropology from Harvard University. She is a former Guggenheim fellow and has been elected to the National Academy of Sciences, the American Academy of Arts and Sciences, the California Academy of Sciences and the American Philosophical Society. She is the author of numerous award-winning books such as That Woman That Never Evolved, Mother Nature, Mothers and Others, and her most recent, Father Time.

Website: https://www.citrona.com/hrdy