Synthetic Porcupine Quill (image) Brigham and Women's Hospital Caption This is a microscopic view of a synthetic porcupine quill. Credit Courtesy of Karp Lab Usage Restrictions Please only use in conjunction with press release. 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.