.THE app of Bayesian inversion to a stable of lithologic criteria in an evaluation of seismic information rarely seems the stuff of headlines. However when the seismic information you are actually assessing stemmed from Mars, as well as when your thinking proposes that the very best description for them is fluid water in the pores between stones, you have a tale. There is actually dwarfs crave extra, when it comes to earthly science, than water on Mars. Why does the possibility prompt such enthusiasm-- and also what performs this brand new investigation contribute to the tale?