Tumamoc Hill, Tucson, Ariz. (image) University of Arizona Caption This is looking toward Tumamoc Hill in Tucson, Ariz., from the northwest side. Credit Courtesy of the Venable lab, University of Arizona's department of ecology and evolutionary biology. Usage Restrictions This photo may be used only to illustrate a story about the research described in the release, 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.