Proboscis monkey sub-mature male feeding on leaves. Anup Shah / Getty Images
By Jason Bittel
At last count, there were 505 nonhuman primate species living in the wilds of 90 countries across the globe. That might make you think of Earth as the Planet of the Apes (plus monkeys, lemurs, tarsiers and lorises), but according to a large study published last month, those statistics are a little misleading.