Studies of evolutionary change require an estimate of fitness, and lifetime reproductive success is widely used for this purpose. However, many species face a trade-off between the number and quality ...
AS BIRTH ANNOUNCEMENTS go, it was momentous. On November 24th India’s government declared that the country’s fertility rate had dropped to 2.0 children per woman. That is below the replacement rate—at ...
Source: BlacknoseDace/Wikimedia Commons, CC BY-SA 4.0 It seems we are surrounded by a generation of singles. Therapy sessions, workshops, and the psychology literature are fixated on the ultimate ...
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