Imagine you're on a tropical island in the Caribbean. There are coconut trees, rocky cliffs, blue-green waters. But now, imagine there are hundreds of monkeys on this island. And, these monkeys have a disease that could kill you, if you're not careful. What you're picturing is a real-life island off the coast of Puerto Rico.
The island of Cayo Santiago hosts the oldest research center in the world for wild primates. Scientists from all over the world come to the island to study questions of primate behavior, cognition and ecology.