Maryland Engineers Create Durable Wood Carbon Sponge (IMAGE) University of Maryland Caption Rigid wood can be directly transformed into a compressible wood carbon sponge by a simple chemical treatment and carbonization. Credit University of Maryland 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.