Lake Vortsjarv (image) National Science Foundation Share Print E-Mail Caption Ice was on Lake Vortsjarv in Estonia. Ice-covered lakes warm faster than those with open water. Credit T.Noges Usage Restrictions None 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.