GIF of Crack Propagation (IMAGE) Michigan Technological University Caption Ghosh and his team use several models to study how cracks form in glass; this animation reveals how a crack can be contained within a softer defect until it reaches the breaking point in the more brittle materials. Credit Susanta Ghosh/Michigan Tech Usage Restrictions please 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.