Clinging Quarter (IMAGE) University of California - Berkeley Caption Quarter clinging to a steeply inclined glass slide. The glass slide is inclined 80 degrees from horizontal. The contacting side of the quarter is covered by a sheet of the micro fiber array. No adhesive is used to keep quarter from sliding. Credit (Photo courtesy of the Fearing Group, UC Berkeley) 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.