Sublime

Then, in 1962, the Scottish ecologist V. C. Wynne-Edwards, a careful observer of his country’s native red grouse, concluded that these birds sometimes sacrificed their reproductive privileges to keep their flock from starvation. The grouse, Wynne-Edwards contended, gauged the amount of food the moors could provide each year and adjusted their behav

Males without “certainty of paternity” are unlikely to stick around to pair-bond with a female and help raise the kids. Male birds tend to have high certainty of paternity, but male mammals are rarely certain at all. As a result, male mammals tend to abandon mates and offspring when—if they could just be confident of their paternity—selection would

A part of Dawkins’s purpose was to explain altruism: behavior in individuals that goes against their own best interests. Nature is full of examples of animals risking their own lives in behalf of their progeny, their cousins, or just fellow members of their genetic club. Furthermore, they share food; they cooperate in building hives and dams; they

Belyaev moved to a Siberian research institute, where he decided to test his ideas by conducting a simple breeding experiment with foxes. Rather than selecting foxes based on the quality of their pelts, as fox breeders would normally do, he selected them for tameness. Whichever fox pups were least fearful of humans were bred to create the next gene

In species in which males stick by their mates or protect their own offspring, it’s because male brains were slightly modified to be more responsive to oxytocin.

In all mammals, and in that majority of birds in which parental care is the rule, offspring are fed and protected by their parents.