Cactus Spine Tattoo Tool 2 (IMAGE) Washington State University Caption This is a close up of a 2,000-year-old cactus spine tattoo tool discovered by WSU archaeologist Andrew Gillreath-Brown. Credit Bob Hubner/WSU Usage Restrictions None 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.