.THE APPLICATION of Bayesian contradiction to a series of lithologic guidelines in an analysis of seismic data rarely seems to be right stuff of headlines. But when the seismic records you are assessing come from Mars, as well as when your reasoning suggests that the best illustration for them is actually liquid water in the pores between rocks, you have a tale. There is dwarfs thirst for even more, when it comes to wandering scientific research, than water on Mars. Why performs the prospect prompt such enthusiasm-- and what performs this brand new study add to the story?