Active Thermal Cloak (image) American Institute of Physics Share Print E-Mail Caption Active thermal cloak hides a circular object in conductive heat flow by "pumping" heat from hot end to cold end. Credit Xu & Zhang/NTU Usage Restrictions This image may be used only with appropriate caption and credit. Share Print E-Mail 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.