Drone (IMAGE) Penn State Caption An unmanned aerial vehicle (drone) flies over the apple orchard on the horticulture farm at Penn State's Russell E. Larson Agricultural Research Center at Rock Springs. Researchers will develop a system that uses drones to help growers protect their tree-fruit crops from frost damage. Credit Courtesy of Joseph Sommer Usage Restrictions non commercial use 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.