Overview
- In July 2026 replicated MOMA capillary tubes successfully separated the two mirror-image forms of pristane and phytane, demonstrating the instrument’s sensitivity and measurement accuracy for chirality tests.
- Analysis of the Murchison meteorite found equal amounts of each enantiomer of pristane and phytane, a racemic pattern the team says matches petroleum-derived aerosols picked up during atmospheric entry or after landing.
- Curiosity’s SAM thermochemolysis (TMAH) experiment recovered a diverse mix of organics from a 3.5-billion-year-old clay-rich rock, reporting 21 carbon-bearing molecules and seven detections confirmed as absent from instrument blanks.
- Researchers stress that neither the chiral test nor the in-situ organic detections prove past life because abiotic chemistry and terrestrial contamination can produce similar molecules and chiral patterns.
- The results both validate a key tool for ESA’s Rosalind Franklin rover and underscore the need for strict contamination controls and eventual Earth-based lab analyses of returned samples, with knock-on concern about rising fossil-fuel aerosols complicating future studies.