Overview
- Curiosity’s science team reported Tuesday in Nature Communications that a 2020 experiment in Gale Crater broke down a clay‑rich rock sample and revealed more than 20 distinct organic molecules.
- The rover’s SAM lab used a TMAH thermochemolysis method that splits large molecules into smaller pieces for GC‑MS analysis, marking the first time this technique was run on another world.
- The detections include ring‑shaped hydrocarbons, possible nitrogen‑bearing heterocycles similar to indoles, and benzothiophene, a sulfur‑containing compound also found in carbon‑rich meteorites.
- The authors say the data cannot tell whether the organics formed through biology, non‑biological chemistry, or arrived on Mars inside meteorites.
- The team concludes the compounds likely persisted for about 3.5 billion years in an ancient lakebed, and the findings increase the urgency to bring Perseverance’s cached samples to Earth for definitive tests.