There are an estimated 35 to 36 million deer in the U.S. Once hunted almost to extinction, they have made a successful recovery. In some states, deer are so plentiful that regular hunting is needed to ...

In 2015, on Japan’s forested island of Yakushima, a male macaque jumped up onto the back of a female sika deer and started trying to mate with it. At the time, researchers believed that the male ...