So if we want to be able to understand, if we want to be able to find those traces of the signatures of life at the surface of Mars, if they are there, we need to understand what was the impact of each of these events on the preservation of its record.
Por isso, se quisermos ser  capazes de entender, se quisermos ser capazes de  encontrar marcas da vida na superfície de Marte, se existirem, precisamos de compreender qual foi  o impacto de cada um destes eventos na preservação dos registos.