Science behind sandcastles (IMAGE) University of Manchester Caption A sandcastle on the beach which is held together by the universal process called capillary condensation. Credit Photo by 'Hello I'm Nik' on Unsplash Usage Restrictions Download from Unsplash.com 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.