.THE APPLICATION of Bayesian contradiction to a range of lithologic specifications in an evaluation of seismic records rarely seems the stuff of titles. Yet when the seismic information you are actually analyzing arised from Mars, and when your thinking suggests that the greatest description for all of them is liquefied water in the pores between rocks, you have a story. There is dwarfs thirst for even more, when it comes to planetal science, than water on Mars. Why does the possibility provoke such exhilaration-- as well as what performs this new research study contribute to the tale?