.THE app of Bayesian contradiction to a series of lithologic parameters in an analysis of seismic data barely seems the stuff of headings. Yet when the seismic data you are analyzing stemmed from Mars, as well as when your reasoning proposes that the best illustration for them is fluid water in the pores in between rocks, you have an account. There is dwarfs thirst for even more, when it concerns planetal scientific research, than water on Mars. Why carries out the prospect provoke such excitement-- as well as what does this brand new investigation contribute to the tale?