What is the northern white-cheeked gibbon? Though they might look a bit like monkeys, northern white-cheeked gibbons are officially classified as apes. One easy way to tell the difference is that ...

Baby red-tailed monkey Khari isn't camera shy. Photo courtesy of the Philadelphia Zoo Khari was born in August at the zoo. White-handed gibbon Eros has a nosh. Photo courtesy of the Philadelphia ...