.THE APPLICATION of Bayesian inversion to a series of lithologic guidelines in an assessment of seismic data rarely seems to be the stuff of headings. However when the seismic information you are assessing come from Mars, as well as when your reasoning recommends that the very best illustration for all of them is fluid water in the pores between rocks, you have a tale. There is actually little people thirst for more, when it pertains to global science, than water on Mars. Why carries out the prospect provoke such enthusiasm-- and also what does this new analysis contribute to the tale?