Enceladus (IMAGE) University of Texas at Austin Caption During its 'snowball' phase, the Earth may have resembled Enceladus, a moon of Saturn that is covered in snow and ice. Credit NASA/JPL-Caltech/Space Science Institute Usage Restrictions Include photo credit 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.