Dripstones in Tjuv-Ante Cave (image) University of Southern Denmark Caption The ceiling in the cave has small drop-like protrusions, which eventually will become dripstones. A dark biofilm of microbial organisms can be seen on the surface. Credit Johannes Lundberg/University of Southern Denmark. Usage Restrictions None 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.