Beavers and their dams play an important role in nature. Because of the dramatic effects their dams have on surrounding ecosystems, these mammals are considered a keystone species. By constructing dams they create wetlands -- lush environments which attract fish, ducks, frogs and other creatures. However, beavers can become a big headache for farmers and landowners -- a problem we'll examine later in this article.
The island of Madagascar, located off the southeastern coast of Africa, is home to a unique primate, the lemur. Take this quiz and see why the lemur resides only in Madagascar.
Any animal that can go from zero to 40 mph in three strides must have a very specialized body. Why can cheetahs run so fast, and how does their ability make them vulnerable?