Drilling hole (IMAGE) Penn State Caption The image shows the Highfield drill hole on Vera Rubin Ridge. Drill powder from this hole showed carbon isotope values indicating a carbon cycle that includes either subsurface life, intense UV radiation penetrating the atmosphere, or Interstellar dust. The image was taken by the Mars Hand Lens Imager on sol 2247. Credit NASA/Caltech-JPL/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.