Change in Surface Darkness (image) University of Bristol Share Print E-Mail Caption This photo shows the change in surface darkness as the cold dry white snow (right side of of image) starts melting to grey (centre of the image), to reveal the dark ice underneath (left side of image). The dots are people to give a sense of the scale. Credit Laura Halbach Usage Restrictions Single use only - with the press release Share Print E-Mail 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.