.THE function of Bayesian contradiction to a variety of lithologic criteria in an evaluation of seismic information barely seems the stuff of headings. But when the seismic information you are assessing stemmed from Mars, and when your reasoning proposes that the most effective description for them is actually liquefied water in the pores between rocks, you have a tale. There is actually dwarfs thirst for extra, when it relates to earthly scientific research, than water on Mars. Why does the prospect prompt such enthusiasm-- and what performs this brand new research add to the story?