2 Cannon Balls Found in the Shipwreck (IMAGE) University of Haifa Caption At first glance, the hull of the warship that sank off the coast of Acre seemed strong; but a unique experiment indicated that the thick timbers could not withstand the cannon balls. Credit Itamar Greenberg, courtesy of the University of Haifa Usage Restrictions The image may only be used with the given 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.