It Is All About Angular Momentum (IMAGE) Forschungsverbund Berlin Caption Wolfgang Pauli and Niels Bohr watching a spinning top in 1954. Credit Photograph by Erik Gustafson, courtesy of AIP Emilio Segre Visual Archives, Margrethe Bohr Collection. Usage Restrictions The image may only be used with appropriate caption and credit and in the context of the press release. 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.