NASA Curiosity rover with SAM (IMAGE) NASA/Goddard Space Flight Center Caption “Selfie” of the Curiosity rover with inset showing the SAM instrument prior to installation on the rover. In this image, the rover is in front of Mount Mercou, a 19.7-foot (6-meter) tall outcrop, and next to the “Nontron” sampling site. This area is in the transition region between the “clay-bearing unit” that the rover has finished exploring and the “sulfate-bearing unit” that the rover is now exploring. Credit NASA/JPL-Caltech/MSSS Usage Restrictions No restrictions. License Public Domain 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.