Forest along the Andes Mountains, Peru (image) Washington University in St. Louis Share Print E-Mail Caption The Andes Mountains in South America are the world's longest mountain range and a hotspot of biodiversity. Here, a view of the tropical forest along mountains in Peru. Credit William Farfan-Rios Usage Restrictions For editorial purposes Share Print E-Mail 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.