Alana Chin, lead author (IMAGE) University of California - Davis Caption Lead author Alana Chin in a redwood forest. She found that redwood trees have two different types of leaves, and they do completely different things. Credit Alana Chin/UC Davis Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.