Scott Egan, Rice University (IMAGE) Rice University Caption Rice University evolutionary biologist Scott Egan inspects galls on the stem of live oak tree at Rice. Credit Brandon Martin/Rice University Usage Restrictions For news reporting purposes only. 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.