Lance Lesack, Simon Fraser University (IMAGE) Simon Fraser University Caption Simon Fraser University geographer Lance Lesack has discovered unexpected climate-driven changes in the mighty Mackenzie River's ice breakup. Credit Simon Fraser University Public Affairs and Media Relations Usage Restrictions None 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.