Arbutus Drill Cover (IMAGE) Grand Challenges Canada Caption The Arbutus Drill Cover, one of six innovations scaling up thanks to Grand Challenges Canada and the Government of Canada. Credit Arbutus / Grand Challenges Canada Usage Restrictions Image may only be used with appropriate 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.