Comparison between Hard and Flexible Top (IMAGE) University of California - San Diego Caption Left: the rigid top fractures on landing, while the top made of nine layers going from rigid to flexible remains intact. Credit Jacobs School of Engineering/UC San Diego/Harvard University Usage Restrictions Please credit UC San Diego/Harvard University 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.