On Earth, the most dangerous ultraviolet radiation for living organisms – UV – is blocked by the ozone layer. However, on Mars, the thin atmosphere, almost devoid of ozone, allows this type of radiation to reach the surface virtually unimpeded, with a powerful sterilizing effect. Nevertheless, a new study suggests that these conditions may not be entirely incompatible with certain forms of life.
The research, led by the Centro de Astrobiologia (CAB, INTA-CSIC) with the collaboration of the Instituto de Quimica Fisica Blas Cabrera (IQF-CSIC), shows that the UV radiation doses measured on Mars are comparable to those that probably existed on early Earth. This implies that, although extreme, they do not completely rule out the possibility of life.
Stunning new images from Mars captured by Rover Curiosity leave scientists in awe
Published in the journal Proceedings of the National Academy of Sciences (PNAS), the study is based on data obtained by the REMS instrument, installed on NASA’s Curiosity rover, which landed in Gale Crater, near the Martian equator, in 2012. For more than five Martian years – equivalent to more than ten Earth years – scientists analyzed radiation in the three main bands: UV-A, UV-B and UV-C.
According to researchers Daniel Viudez-Moreiras, Maria Paz Zorzano and Alberto Gonzalez Fairen, the analysis shows that the radiation reaching the Martian soil is distributed approximately 80% in UV-A, 15% in UV-B and 5% in UV-C
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