Carbon-Rich Rocks May Have Cooled the Ancient Martian Atmosphere

The Perseverance rover photographed the Margin Unit (Mars 2020 mission, sols 1005–1006) in the Jezero Crater. The inset images show spectroscopic mineral data from the rover’s SuperCam instrument suite. Credit: Navcam image: NASA/JPL-Caltech ; SuperCam mosaics : NASA/JPL-Caltech/LANL/CNES/CNRS/IRAP