Animals that researchers call “supersucklers” come back for their mother’s milk even after they can hunt, mate and fend for ...

A new study posits that same-sex sexual behavior developed to help primates in complex social groups ease tension, reduce ...

Bonds between same-sex individuals help apes and monkeys to manage conflict and strengthen alliances, especially in dry ...

Discover the bizarre facts and fiction about the Virginia opossum's incredible symmetrical reproductive system.

Homosexual behavior in primates has a deep evolutionary basis and is more likely to occur in species that live in harsh ...