This story appears in the August 2011 issue of National Geographic magazine. In India monkey business takes on a whole new meaning. Hanuman langurs are trained in New Delhi to scare off aggressive ...

Scientists think these outsize organs create an echo chamber that amplifies the monkey’s call, impressing females and intimidating rival males. Proboscis monkeys are endemic to the jungles of ...

In short, the total costs for a monkey can easily reach over $20,000, and that number will climb a great deal if you opt for ...