Lightning (IMAGE) IOP Publishing Caption This image shows lightning. Credit Pixabay 2015 <a target="_blank"href="https://creativecommons.org/about/cc0">CC0 (No Rights Reserved)</a> Usage Restrictions <a target="_blank"href="https://creativecommons.org/about/cc0">CC0</a> Public Domain -- no restrictions. 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.