Testing the Final Structure (IMAGE) California Institute of Technology Caption To test the strength of the resulting structure, Greer crushes it and records its reaction. Credit Greer Lab/Caltech Usage Restrictions For use in news stories only 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.