Greenland Ice Core (image) Future Earth Share Print E-Mail Caption A researcher inspects an ice core collected from Greenland. These records can give scientists a precise date of when volcanic eruptions occurred around the world over the last 2500 years. Credit M. Sigl Usage Restrictions Image may only be used with appropriate caption and in relation to this paper. 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.