Mars: new insights and unresolved questions

@article{Changela2021MarsNI,
  title={Mars: new insights and unresolved questions},
  author={Hitesh G. Changela and Elias Chatzitheodoridis and Andr{\'e} Antunes and David Beaty and Kristian Bouw and John Charles Bridges and Klara Capova and Charles S. Cockell and Catharine A. Conley and Ekaterina Dadachova and Tiffany D. Dallas and Stefaan de Mey and Chuanfei Dong and Alex Ellery and Martin Ferus and Bernard H. Foing and Xiaohui Fu and Kazuhisa Fujita and Yangting Lin and Sohan Jheeta and L. J. Hicks and Sen Hu and {\'A}kos Kereszturi and Alexandros Krassakis and Yang Liu and Juergen Oberst and Joseph R. Michalski and P. M. Ranjith and Teresa Rinaldi and David A. Rothery and Hector A. Stavrakakis and Laura Selbmann and R. K. Sinha and Alian Wang and Kenneth H. Williford and Zolt{\'a}n V{\'a}ci and Jorge L. Vago and Michael Waltemathe and John Edward Hallsworth},
  journal={International Journal of Astrobiology},
  year={2021}
}
Mars exploration motivates the search for extraterrestrial life, the development of space technologies, and the design of human missions and habitations. Here, we seek new insights and pose unresolved questions relating to the natural history of Mars, habitability, robotic and human exploration, planetary protection, and the impacts on human society. Key observations and findings include: – high escape rates of early Mars' atmosphere, including loss of water, impact present-day… 
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7 Citations
Background Citations
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7 Citations

Remote and in-Situ Characterization of Mars Analogs: Coupling Scales to Improve the Search for Microbial Signatures on Mars
Past environments on Mars contained abundant water, suggesting certain regions may have been conducive to life as we know it and implying the potential for microbial inhabitants. Gale and Jezero…
Microbial Survival in an Extreme Martian Analog Ecosystem: Poás Volcano, Costa Rica
Past acid-sulfate hydrothermal systems on Mars have promise in their ability to have hosted life for billions of years. One method for analyzing these systems is to study analog environments on…
Unearthing terrestrial extreme microbiomes for searching terrestrial-like life in the Solar System.
Distribution of Dune Landform on Mars
Dune landforms are widely distributed on Mars and contain abundant information about the Martian atmosphere and sedimentary environment. At present, the understanding of Martian dunes and their…
Water is a preservative of microbes
TLDR
The activities of water as a preservative are focused on—its capacity to maintain the long‐term integrity and viability of microbial cells—and the mechanisms by which this occurs are identified.
Editorial: Extremophiles: Microbial genomics and taxogenomics
COPYRIGHT © 2022 de la Haba, Antunes and Hedlund. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction…
Raman spectroscopic peculiarities of Icelandic poorly crystalline minerals and their implications for Mars exploration
In this work, we have analyzed natural samples collected at three hydrothermal areas of Iceland by Raman spectroscopy. The studied high-latitude regions are considered environmentally and…

References

SHOWING 1-10 OF 353 REFERENCES
Mars 2020 Mission Overview
The Mars 2020 mission will seek the signs of ancient life on Mars and will identify, prepare, document, and cache a set of samples for possible return to Earth by a follow-on mission. Mars 2020 and…
The NASA Mars 2020 Rover Mission and the Search for Extraterrestrial Life
Mars Science Laboratory Mission and Science Investigation
AbstractScheduled to land in August of 2012, the Mars Science Laboratory (MSL) Mission was initiated to explore the habitability of Mars. This includes both modern environments as well as ancient…
The WISDOM Radar: Unveiling the Subsurface Beneath the ExoMars Rover and Identifying the Best Locations for Drilling
Abstract The search for evidence of past or present life on Mars is the principal objective of the 2020 ESA-Roscosmos ExoMars Rover mission. If such evidence is to be found anywhere, it will most…
Mars methane detection and variability at Gale crater
TLDR
Curiosity confirms the presence and variability of atmospheric methane, implying episodic production from an unknown source, and reports of plumes or patches of methane in the martian atmosphere that vary over monthly time scales have defied explanation.
Biosignatures on Mars: What, Where, and How? Implications for the Search for Martian Life
TLDR
It is hypothesized that, given the lack of long-term, continuous habitability, if martian life developed, it was (and may still be) chemotrophic and anaerobic, and the biogenicity of these signatures is evaluated by comparing them to possible abiotic features.
The Climate of Early Mars
The nature of the early martian climate is one of the major unanswered questions of planetary science. Key challenges remain, but a new wave of orbital and in situ observations and improvements in…
Methane and related trace species on Mars: Origin, loss, implications for life, and habitability
The Role of Meteorite Impacts in the Origin of Life
TLDR
It is proposed that meteorite impact events are a fundamental geobiological process in planetary evolution that played an important role in the origin of life on Earth and should be considered prime sites in the search for evidence of past life on Mars.
The Martian subsurface as a potential window into the origin of life
Few traces of Earth’s geologic record are preserved from the time of life’s emergence, over 3,800 million years ago. Consequently, what little we understand about abiogenesis — the origin of life on…
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