(PhysOrg.com) -- Females with fewer sexual partners can explain where bird species have evolved to cooperate in the rearing of their young, according to Oxford University research. In a study of 267 ...

For far too long, women have been seen as secondary to men under the patriarchal rule of human society. Yet, humanity's existence has been a minor blip in the history of the Earth, where females are ...

Many animal societies involve highly promiscuous mating behavior, making it potentially complicated for individuals to recognize and preferentially help their relatives. Researchers have now shown ...