.THE app of Bayesian contradiction to a stable of lithologic specifications in an analysis of seismic information rarely seems to be the stuff of titles. But when the seismic records you are evaluating arised from Mars, as well as when your thinking suggests that the most effective illustration for them is liquid water in the pores in between rocks, you possess a story. There is dwarfs crave extra, when it concerns planetary science, than water on Mars. Why carries out the possibility prompt such enthusiasm-- and also what does this new research study include in the story?