North America's Oldest Monkey Fossil (IMAGE) Iowa State University Caption A student digs for fossils in the rock exposed by expansion of the Panama Canal. This is where paleontologists found North America's oldest monkey fossil. Credit Photo by Jason Head. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.