Women living in the 17th to 19th centuries had a slightly lower life expectancy if they gave birth to multiple sons, rather than to daughters.
Women living in the 17th to 19th centuries had a slightly lower life expectancy if they gave birth to multiple sons, rather than to daughters.
Mouse mothers emit ultrasound vocalizations and odor cues to stimulate otherwise uninterested fathers to provide parental care to their pups.
Scientists share their experiences weathering extremely stressful events without letting their careers get completely derailed.
Caring for a child can suppress testosterone levels in men.
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