Mars Geoscience and Astrobiology Investigations

Mars geoscience and astrobiology investigations seek to reconstruct the planet’s environmental evolution, assess its past and present habitability, and chart pathways to detect evidence of life. This multidisciplinary field integrates orbital remote sensing, lander and rover in situ analyses, laboratory experimentation and climate modelling. Geoscientific efforts focus on mapping stratigraphy, mineralogy and geomorphology to reveal the roles of water, volcanism, impact processes and aeolian activity in shaping the Martian surface and subsurface. Astrobiological studies centre on the detection, preservation and distribution of organic molecules in ancient lacustrine and hydrothermal settings, as well as the potential for extant microbial niches sustained by transient brines or subsurface aquifers. Advanced spectroscopic and imaging techniques deployed by rovers, coupled with seismological and heat‐flow measurements, have provided unprecedented insights into the crustal and interior structure of Mars. Together these approaches inform models of early climate, atmospheric evolution and the carbon cycle, while guiding the selection of future sampling sites for sample return and human exploration.

Research from Nature Portfolio

Recent studies have reported the detection of diverse aromatic organic molecules within mineral matrices at Jezero crater, revealing distinct fluorescence and Raman signatures in aqueous‐altered formations. These findings indicate that carbon‐rich species can be preserved in association with clay and carbonate minerals, suggesting that past aqueous environments played a critical role in organic synthesis, transport and long‐term preservation. Complementary work at the InSight landing site has used imaging and surface excavation by descent thrusters to characterise the surficial geology of Elysium Planitia. This research identified a thin veneer of dust and sand underlain by a cemented duricrust over basaltic regolith, confirming pre‐landing predictions and providing context for seismic and heat‐flow measurements aimed at constraining crustal layering and impact‐driven regolith processes.

Mars Geoscience and Astrobiology Investigations publication trend

The graph below shows the total number of articles in mars geoscience and astrobiology investigations across all publications each year (not limited to Nature Index journals).

Technical terms

Regolith: The layer of loose, unconsolidated rock fragments and dust that covers solid bedrock on planetary surfaces.

Duricrust: A hardened surface crust formed when soluble minerals precipitate and cement soil or sediment particles together.

Aeolian processes: Geological changes and sediment transport driven by wind, including dune formation and dust lifting.

Raman spectroscopy: A non‐destructive technique that analyses vibrational modes of molecules to identify mineral and organic compositions.

Collision-induced absorption: A greenhouse effect mechanism in which non‐polar gas pairs briefly absorb infrared radiation during molecular collisions, enhancing warming.

References

1. Diverse organic-mineral associations in Jezero crater, Mars. Nature (2023).
2. Geology of the InSight landing site on Mars. Nature Communications (2020).
3. Mars Seismology. Annual Review of Earth and Planetary Sciences (2023).
4. In situ analysis of surface composition and meteorology at the Zhurong landing site on Mars. National Science Review (2023).
5. Transient reducing greenhouse warming on early Mars. Geophysical Research Letters (2017).