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Curiosity detected over 20 organic molecules in ancient Martian rock

Astrobiology research
NASA/JPL-Caltech, Wikimedia Commons, Public domain · Public domain

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Research area:physics-astronomy

What the study found

The study found that more than 20 organic molecules were detected in clay-bearing sandstones from Gale crater on Mars. These molecules included benzothiophene, methyl benzoate, and single and dicyclic aromatic molecules.

Why the authors say this matters

The authors conclude that the experiment successfully released molecules preserved in ancient macromolecular or free organic matter within Martian bedrock, despite about 3.5 billion years of diagenesis and radiation exposure. The study suggests this helps show that organic matter can still be detected in old Martian rocks.

What the researchers tested

The researchers used the Sample Analysis at Mars instrument suite on board the Curiosity rover to analyze clay-bearing sandstones in the ~3.5-billion-year-old Knockfarrill Hill member of Glen Torridon, Gale crater. They used the onboard tetramethylammonium hydroxide wet chemistry experiment, together with evolved gas analysis and gas chromatography-mass spectrometry.

What worked and what didn't

The wet chemistry experiment released diverse thermochemolysis products, and more than 20 organic molecules were detected. The abstract does not report any failed detections or negative outcomes beyond noting the long-term effects of diagenesis and radiation exposure.

What to keep in mind

The summary provided here is limited to the abstract, so detailed limitations are not described. The findings apply to the specific Martian rock unit and the instruments used in this study.

Key points

  • More than 20 organic molecules were detected in Martian clay-bearing sandstones.
  • The samples came from the ~3.5-billion-year-old Knockfarrill Hill member in Gale crater.
  • Tetramethylammonium hydroxide wet chemistry released diverse thermochemolysis products.
  • Detected molecules included benzothiophene, methyl benzoate, and aromatic molecules.
  • The authors say the results indicate preserved organic matter remained detectable despite long-term diagenesis and radiation exposure.

Disclosure

Research title:
Curiosity detected over 20 organic molecules in ancient Martian rock
Authors:
Amy J. Williams, J. L. Eigenbrode, M. Millán, Ross H. Williams, Ophélie McIntosh, Samuel Teinturier, Janelle Roach, Charles Malespin, Amy C. McAdam, Paul Mahaffy, A. B. Bryk, A. Buch, David Boulesteix, Luoth Chou, Jason P. Dworkin, Valerie Fox, H. B. Franz, Caroline Freissinet, D. P. Glavin, Christopher H. House, S. S. Johnson, J. M. T. Lewis, Angel Mojarro, R. Navarro‐González, Chad Pozarycki, A. Steele, Roger E. Summons, Cyril Szopa, M. T. Thorpe, A. R. Vasavada
Institutions:
Carnegie Institution for Science, Catholic University of America, CentraleSupélec, CentraleSupélec, Centre National de la Recherche Scientifique, Centre National de la Recherche Scientifique, Centre National de la Recherche Scientifique, Centre National de la Recherche Scientifique, Georgetown University, Georgetown University, Georgia Institute of Technology, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Goddard Space Flight Center, Howard University, Institut Pierre-Simon Laplace, Institut Pierre-Simon Laplace, Institut Pierre-Simon Laplace, Institut Pierre-Simon Laplace, Jet Propulsion Laboratory, Laboratoire atmosphères, milieux, observations spatiales, Laboratoire atmosphères, milieux, observations spatiales, Laboratoire atmosphères, milieux, observations spatiales, Laboratoire atmosphères, milieux, observations spatiales, Massachusetts Institute of Technology, Massachusetts Institute of Technology, Pennsylvania State University, Planetary Science Institute, Sorbonne Université, Sorbonne Université, Sorbonne Université, Sorbonne Université, Universidad Nacional Autónoma de México, Université de Versailles Saint-Quentin-en-Yvelines, Université de Versailles Saint-Quentin-en-Yvelines, Université de Versailles Saint-Quentin-en-Yvelines, Université de Versailles Saint-Quentin-en-Yvelines, Université Paris-Saclay, Université Paris-Saclay, Université Paris-Saclay, Université Paris-Saclay, University of America, University of California, Berkeley, University of Florida, University of Florida, University of Maryland, College Park, University of Minnesota, University of Notre Dame, University of Notre Dame, University of Notre Dame
Publication date:
2026-04-21
DOI:
10.1038/s41467-026-70656-0
OpenAlex record:
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Image credit:
NASA/JPL-Caltech, Wikimedia Commons, Public domain
AI provenance: This post was generated by gpt-5.4-mini (OpenAI). The original authors did not write or review this post.

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