.THE function of Bayesian inversion to a series of lithologic guidelines in an evaluation of seismic information rarely seems to be the stuff of titles. Yet when the seismic records you are analyzing arised from Mars, and when your reasoning recommends that the most ideal description for all of them is actually fluid water in the pores between rocks, you possess a story. There is actually dwarfs thirst for more, when it involves planetary science, than water on Mars. Why does the prospect provoke such enjoyment-- and what performs this brand-new research study contribute to the story?