A view of Garbh Eileach (IMAGE) University College London Caption A view of Garbh Eileach, the largest island in the Garvellach island chain where the gradational transition into snowball Earth is recorded. Credit Credit: Graham Shields Usage Restrictions Must be used with credit License Original 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.