X-Ray Pulse Strikes Water (image) DOE/SLAC National Accelerator Laboratory Caption An X-ray laser pulse at SLAC's Linac Coherent Light Source probes a supercooled water droplet (center, left). The speed and brightness of the X-ray pulses allowed researchers to study water molecules in the instant before freezing. Credit Greg Stewart/SLAC Usage Restrictions Provide credit 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.