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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