.THE app of Bayesian inversion to a stable of lithologic criteria in an examination of seismic records hardly appears right stuff of titles. But when the seismic data you are determining originated from Mars, and when your reasoning proposes that the best description for them is actually fluid water in the pores between stones, you possess an account. There is actually dwarfs crave more, when it pertains to planetal science, than water on Mars. Why carries out the possibility produce such pleasure-- and also what does this brand-new investigation include in the story?