Some Growing Cave Formations Appear to Defy Gravity (image) University of Arizona Share Print E-Mail Caption Actively growing cave formations such as thread-like helictites and soda straws crowd the walls of Kartchner Caverns in areas where drip water percolates into the cave. Credit Bob Casavant/Arizona State Park Service Usage Restrictions This visual may only be used in conjunction with reporting/posting of this news release. Image/video credit must be included exactly as indicated. 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.