Morphological comparison of biomorphs in astrobiology is a commonly applied methodology to putative bacterial structures found in meteorites from Mars and other extraterrestrial bodies. Geomorphs, such as landscapes, sediment patterns and sequences, red soils, and permafrost polygonal patterns as surficial features, found on Earth find their perfect equivalents on the images of Mars. Moreover, landscape, sediment, red soil and permafrost analogues show a similar geographical distribution on Mars, and they are perfectly comparable to the distribution displayed on Earth. Since the habitat of life is confined to these surface geomorphs of Earth and Mars, it becomes a complex effort to disentangle whether or not the genesis of these geomorph parallels reflect a common evolution on Mars and Earth. These similarities in the shaping and weathering of the surface crusts of both planets point to comparable processes at some point in time and leave the question of why this common evolution is presumed not to continue today.
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