The Green Group has been studied by scientists for 15 years and is currently made up of approximately 80 individuals. The first way to tell the difference between macaques is their size.

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 ...

Of two hunky monkeys, which would you say has the most sex appeal? That’s easier to answer if you’re a rhesus macaque (Macaca mulatta)—or Constance Dubuc, an evolutionary biologist at the ...