Overview
- Scientists reporting Tuesday in Nature Communications say Curiosity detected more than 20 organic molecules in Gale Crater rock, including seven never before seen on Mars.
- The finds include benzothiophene and naphthalene and the first nitrogen‑bearing heterocycle on Mars, a structure similar to indole‑like precursors of RNA and DNA.
- Curiosity’s SAM instrument used a rare tetramethylammonium hydroxide wet‑chemistry run to break apart large organics for analysis, targeting a 3.5‑billion‑year‑old, clay‑rich sample drilled in 2020.
- Researchers caution the organics could come from nonliving chemistry or meteorites, so confirming any biological origin will likely require returned samples and multiple independent tests.
- The validated TMAH approach is informing ESA’s Rosalind Franklin rover and NASA’s Dragonfly mission, which plan similar experiments later this decade.