.THE app of Bayesian inversion to a series of lithologic criteria in an analysis of seismic records rarely seems to be the stuff of headlines. Yet when the seismic data you are actually examining come from Mars, and when your thinking proposes that the best explanation for all of them is actually liquefied water in the pores between rocks, you possess a story. There is dwarfs thirst for a lot more, when it comes to worldly scientific research, than water on Mars. Why carries out the possibility prompt such exhilaration-- and what performs this new research study add to the tale?