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 ...

Learn more about mammal monogamy rates, which support the theory that the primary mating pattern in Homo sapiens is monogamy.

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 first study to analyse rates of full vs half siblings in a range of mammals provides new evidence for monogamous ...

Last year, the New York Times (Mooallem, 03.29.10), published an article entitled "Can animals be gay?" which discussed biologists' recent and past discoveries of same-sex animal behavior, how ...

Humans are far more monogamous than our primate cousins, but less so than beavers, a new study suggests. Researchers from the University of Cambridge in England analyzed the proportion of full ...

Michelle Spear does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...