Report, if you have a problem with this page“ with rare exceptions (chiefly the social insects), mammals and birds are the only organisms to devote substantial attention to the care of their young; an evolutionary development that, through the long period of plasticity which it permits, takes advantage of the large information-processing capability of the mammalian and primate brains. Love seems to be an invention of the mammals. ”
Carl Sagan
From : Dragons of Eden: Speculations on the Evolution of Human Intelligence
