MNN - Mother Nature Network

Until 1963, when Jane Goodall published her work on wild chimpanzees using tools, most scientists believed that tool use was a uniquely human trait. Now half a century later, we're finally beginning to know better. The line between humans and other animals is one of mere degree, not of kind. And to prove it, here's our list of 15 creatures from across the animal kingdom that use tools. (Text by Bryan Nelson)