Single-photon airborne lidar illustration (IMAGE) Optica Caption A new compact and lightweight single-photon airborne lidar system could make single-photon lidar practical for air and space applications such as 3D terrain mapping. Credit Feihu Xu, University of Science and Technology of China Usage Restrictions None 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.