Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Same-sex sexual ...

Two lion brothers rubbing heads in sign of affection and bonding© RichartPhotos/Shutterstock.com Scientists have recorded same-sex behavior across many animal groups ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Homosexual behavior is much more common across the animal kingdom than ...

We project a great deal onto animals. They are elevated into ideals of love and fidelity (dogs, horses), and often they are reduced to objects and tools (cattle, pigs, horses again). Much of ...

Scientists have identified dozens of previously overlooked cultural behaviors in wild chimpanzees, suggesting that the great ...

A tiger walks the same worn groove along the edge of its exhibit like a broken record. A parrot methodically plucks out its own feathers until bare skin shows through. To a casual visitor, these can ...

A perspective in the Journal of the Royal Society Interface argues that advances in AI, sensing technologies and modeling are transforming the study of collective animal behavior, with implications ...

I've studied various aspects of play behavior in a wide variety of nonhuman animals (animals) for decades, focusing mostly on members of the "dog family" (canids), while some of my students have ...

I've been studying various aspects of animal behavior, especially in mammals, for many decades and have always felt uneasy about how cultural values have limited our true understanding of the dynamics ...