Silica Gel Beads (IMAGE) Southwest Research Institute Caption SwRI researchers are using these silica gel beads as part of a low-cost, large-scale meth-od to harvest water molecules from the air. As they expel moisture, they turn from blue to pink. Credit Southwest Research Institute Usage Restrictions Images/videos may be used by the media and the public for educational and informational purposes only 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.