.THE app of Bayesian contradiction to a stable of lithologic parameters in an analysis of seismic information hardly appears right stuff of headlines. However when the seismic records you are examining come from Mars, as well as when your reasoning proposes that the most ideal explanation for them is liquid water in the pores in between stones, you have a story. There is dwarfs crave extra, when it concerns wandering science, than water on Mars. Why does the prospect produce such enthusiasm-- as well as what performs this brand-new investigation contribute to the story?