Every year, researchers and people out in nature capture some aspect of animal behavior that’s unusual or unexpected in some way, changing how we understand the natural world. Here are five such ...

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 ...

The human capacity to learn exceeds that of any other animal. Indeed, our massive memories and impressive computing power are the engines of all that makes us different from other animals, rooted ...