Demonstration of aerial-aquatic locomotion and transition. Demonstration of aerial-aquatic locomotion and transition. (A) The robot is capable of aerial hovering, air-to-water transition, swimming, water-to-air transition, impulsive takeoff, and landing. (B) Composite image of a hovering robot. (C) Composite image of the robot transitioning from air to water. (D) Composite image of the robot swimming to the water surface. (E) Images of the robot gradually emerge from the water surface by capturing gas from electrolysis. (F) Composite image of robot takeoff and landing. Scale bars, 1 cm. Yufeng Chen et al. Sci. Robotics 2017;2:eaao5619 Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works