Multitudinous Slices (VIDEO) Science China Press This video is under embargo. Please login to access this video. Caption Multitudinous slices of crack tips demonstrate the complicated twisted main crack and many microcracks ahead of the crack tips which are identified as important toughening mechanisms for many structural materials Credit ©Science China Press Usage Restrictions Use with 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.