Cover Picture (IMAGE) University of Vienna Caption Images of oxygen (upper row) and nitrogen atoms (lower row) in a carbon network, recorded at the microscopy laboratory of the University of Vienna. Among the expected configurations, oxygen is also found with three neighbors as well as in a "pair" configuration with another oxygen. Credit © Christoph Hofer and Jannik Meyer, Creative Commons Attribution 4.0 Usage Restrictions The image may only be used with appropriate caption or credit. 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.