Changing perspectives

I read this interesting passage, in a biology book that I am reading now.

The biology community is part of society at large, embedded in the cultural milieu of the times. For example, changing attitudes about career choices have increased the proportion of women in biology, which has in turn affected the emphasis in certain research fields. A few decades ago, for instance, biologists who studied the mating behavior of animals focused mostly on competition among males for access to females. More recent research, however, emphasizes the important role that females play in choosing mates. For example, in many bird species, females prefer the bright coloration that “advertises” a male’s vigorous health, a behavior that enhances the female’s probability of having healthy offspring.

– From ‘Biology’ by Neil Campbell and Jane Reece