Kitadai Figure 2 (image) Tokyo Institute of Technology Share Print E-Mail Caption Conceptual diagram of a hydrothermal vent assumed to have been widely distributed on the Hadean ocean floor. Hydrogen and hydrogen sulfide contained in hydrothermal fluids are oxidized inside the vent, and the generated electrons flow away from the vent along the electric potential difference between hydrothermal fluids and seawater, which generates a steady electric current (hydrothermal electricity generation). Credit Kitadai et al. (2019) Science Advances Usage Restrictions The image may only be used with appropriate caption and credit. Share Print E-Mail 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.