Sexuality and gender are often at the forefront of cultural and political debate today. In his new book, The Sexual Evolution: How 500 Million Years of Sex, Gender, and Mating Shape Modern ...

Sticking with a long-term life partner to rear children has long been considered a dominant mating pattern for our species, although reproductive monogamy is not universal across our many cultures and ...

In the animal kingdom, mating isn’t always about survival. From praying mantises to octopuses, some species die during or ...

In the animal kingdom, penises can be spiked, split, corkscrewed—even detachable. They're one of the most diverse structures in biology. The human penis is so uniform, it's an anatomical outlier.

The evolution of sex, gender, mating strategies, and social relationships are hot topics in the study of nonhuman and human behavior. 1 People from many different disciplines are weighing on these and ...