Not to sound paranoid, but Old World Monkeys definitely know more than they let on. Just look at the Gray Langur also known as the Hanuman monkey, native to the Indian subcontinent. This wise guy definitely has a brain brimming with secrets - for example, how monkeys got from Africa and Asia to South America (the leading theory is that primates literally rafted across the Atlantic, which is insane.)

Unfortunately, the Gray Langur refuses to spill the tea, choosing instead to pick leaves, groom friends, practice its distinctive tail-looping walk or contemplate life at 13,000 ft in the Himalayas. We even tried to interview one, but these guys are hard to pin down, often leaping up to 15 feet away with a sly grin.