.THE app of Bayesian contradiction to a series of lithologic specifications in an assessment of seismic information hardly seems to be right stuff of titles. Yet when the seismic data you are analyzing originated from Mars, and also when your thinking proposes that the greatest description for all of them is liquid water in the pores in between stones, you have a tale. There is dwarfs crave more, when it relates to nomadic science, than water on Mars. Why does the possibility provoke such enthusiasm-- and also what does this brand-new analysis contribute to the story?