Liquid Metal (IMAGE) RMIT University Caption This image of a liquid metal 'slug' and its clear atom-thick 'trail' shows the breakthrough in action. When dissolved in a liquid metal core, certain metals leave behind this clear layer of their oxide, which is no thicker than a few atoms and can be peeled away by touching or rolling. Credit RMIT University Usage Restrictions credit RMIT University 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.