RTOF on Laser Stack (IMAGE) Southwest Research Institute Caption This image shows the Chemistry Organic and Dating Experiment (CODEX), an instrument for in-situ dating of samples, capable of accuracy of ±20 million years. It was created by Southwest Research Institute scientists and is intended for future missions to Mars. Credit SwRI Usage Restrictions Images/videos may be used by the media and the public for educational and informational purposes only 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.