Entropy Made Visible (IMAGE) Harvard University Caption The magnetic "stick and ball" construction toys first used to understand entropy, or all the possible cluster structures that could be formed from a given number of particles. Credit Vinothan Manoharan, Harvard School of Engineering and Applied Sciences 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.