.THE app of Bayesian contradiction to a series of lithologic specifications in an assessment of seismic information rarely seems to be right stuff of titles. Yet when the seismic records you are analyzing stemmed from Mars, and also when your reasoning suggests that the best illustration for all of them is actually liquid water in the pores in between rocks, you possess a tale. There is actually little people crave even more, when it comes to planetary science, than water on Mars. Why carries out the possibility prompt such exhilaration-- as well as what does this new analysis include in the story?