Figure 2 (IMAGE) Tohoku University Caption Approximately 30 types of plant leaves used in the sensor's functional test. Credit ©Kohzuma and Miyamoto Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original 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.