Elephant Bird Bone Chop Marks (image) Zoological Society of London Share Print E-Mail Caption This chop mark would have been made with a large sharp tool. The clear straight line of the cut with no continued cracks indicate the mark was made on fresh bone and chopped into different cuts of meat. Credit ZSL 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.