Fig.3 (IMAGE) Osaka University Caption (Left) Growing cluster attracting many galaxies and dark matter. Galaxies are rapidly falling and gas temperature tends to rise. The new law indicates that the clusters are in this state. (Right) Matured cluster in a calm state, attracting little material. Credit credit: Yutaka Fujita Usage Restrictions None 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.