Pearl River Delta, China (image) University of Colorado at Boulder Caption Deltas around the world are sinking, according to a new study led by CU-Boulder. This image of the Pearl River Delta in China taken was by NASA's space shuttle Endeavour, with the areas below sea level shown in purple. Credit Image courtesy NASA, CSDMS, University of Colorado. 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.