.THE function of Bayesian inversion to a range of lithologic specifications in an analysis of seismic information rarely appears the stuff of headlines. However when the seismic information you are analyzing arised from Mars, and when your reasoning recommends that the very best explanation for all of them is actually liquid water in the pores between rocks, you possess a tale. There is actually dwarfs thirst for extra, when it pertains to planetary science, than water on Mars. Why does the prospect prompt such pleasure-- as well as what performs this new research add to the tale?