Birkhead reveals a world in which males and females vie with each other as they strive to maximize their reproductive success. Color illustrations.

Birkhead reveals a world in which males and females vie with each other as they strive to maximize their reproductive success. Color illustrations.

Males are promiscuous and ferociously competitive. Females--both human and of other species--are naturally monogamous. That at least is what the study of sexual

In a pitch-perfect literary parody, Eckstut and Auburn claim to have stumbled upon lost manuscript pages from Jane Austen's novels, along with shocking letters

Wide-ranging research suggests that partners in gay male and bisexual relationships do not necessarily expect monogamy, or see it as an important issue. Althoug