Stretch with Crack (image) Harvard University Share Print E-Mail Caption The researchers used a razor blade to cut a 2-cm notch across the gel. In the image above (left), the gel has been stretched very slightly so that the notch is visible. This damaged gel was still able to stretch to 17 times its initial length without breaking. Credit Photo courtesy of Jeong-Yun Sun 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.