Curiosity finds largest organics yet on Mars; decane–dodecane amounts not fully explained by abiotic processes
Scientists analysing a Curiosity rock sample report the largest organic molecules yet detected on Mars — decane, undecane and dodecane — and say conventional abiotic sources cannot fully explain their abundance. Researchers suggest the compounds may be fatty‑acid fragments, a potential biosignature that raises stakes for sample‑return and planetary‑protection planning.