Overview
- Curiosity’s team reported Tuesday in Nature Communications that bedrock from Gale Crater’s clay-rich Glen Torridon holds multiple organic compounds in sediments laid down by water about 3.5 billion years ago.
- The rover’s onboard lab, Sample Analysis at Mars, used a first-of-its-kind chemical breakdown with TMAH on a drill sample from the Mary Anning site to turn large molecules into gases it could identify.
- Scientists identified more than 20 target chemicals, including seven confirmed organic compounds with five never before seen on Mars, and a nitrogen-bearing molecule with a proto‑DNA–like structure.
- The results include evidence of macromolecular carbon preserved near the surface, showing that large, complex organics can survive Mars’ harsh radiation in protective clay minerals.
- Researchers say these molecules could come from geologic reactions or meteorites rather than biology, and they note that only returned samples can test for life, with similar analyses planned for ESA’s Rosalind Franklin rover and NASA’s Dragonfly mission.