Drilling powder (IMAGE) The University of Hong Kong Caption Tracey-Leigh Prigge drilling powder from pangolin scales to be used for DNA extractions and/or Stable Isotope Analysis (SIA). (Credit: Tracey-Leigh Prigge) Credit Tracey-Leigh Prigge Usage Restrictions N/A License Original 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.