SURACE DESTRUCTION. “Energetic particles are capable of destroying organic materials present in the surface or subsurface environment of planets with thin atmospheres. A number of studies have been devoted to studying the impact of Galactic cosmic rays on the possible destruction of organic matter on Mars. Mars’ surface radiation dose is several orders of magnitude higher than that of the Earth due to its thin atmosphere.”
https://royalsocietypublishing.org/doi/10.1098/rsif.2016.0459