Ken MacLeod, University of Missouri-Columbia (image) University of Missouri-Columbia Share Print E-Mail Caption In a new study, MacLeod found evidence that a continental ice sheet did not form during the Late Cretaceous Period more than 90 million years ago. This information could help scientists predict changes in earth's climate as our temperatures rise. Credit University of Missouri 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.