.THE app of Bayesian contradiction to a series of lithologic parameters in an evaluation of seismic information hardly seems the stuff of titles. Yet when the seismic information you are determining stemmed from Mars, and also when your thinking advises that the most effective description for all of them is liquid water in the pores in between stones, you possess a tale. There is little people thirst for much more, when it concerns worldly science, than water on Mars. Why does the possibility provoke such pleasure-- and what performs this new research study add to the story?