Rivers1.jpg (IMAGE) Stanford University Caption Costa Rican naturalist and Stanford research collaborator Dunia Villalobos examines a river in Las Cruces, Costa Rica. Credit Rebecca Chaplin-Kramer Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.