Nate Heygi: This is Karyn Anderson. She’s a primate behavioral ecologist at the University of Toronto. She studies same-sex relationships in the animal kingdom. And she says, first off, there are ...

A giraffe gave birth to her first calf at Utah's Hogle Zoo in Salt Lake City, with zoo officials saying he appears curious ...

After reviewing recent genetic, morphological, and biogeographic studies on giraffes, scientists have now split the single ...

A new study comparing 59 species of primates linked same-sex sexual behavior to scarce resources and more predators in socially complex species. The findings show diverse sexual behaviors are common — ...

For a few fleeting weeks each winter, the famously elusive cats emerge from solitude, calling across the mountains in search of a mate.

Take a peek into the always entertaining lives of birds, from intimate moments with mates to fierce fights for territory.