Time-Lapse Photographs (IMAGE) University College London Caption These are time-lapse photographs of water droplets bouncing on the treated glass, steel, cotton wool and filter paper surfaces (droplet size: ca 6.3 ± 0.2 μL). Credit Lu Yao, UCL Usage Restrictions So long as the author is credited. 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.