.THE APPLICATION of Bayesian inversion to a series of lithologic specifications in an examination of seismic data rarely seems right stuff of titles. But when the seismic records you are examining arised from Mars, as well as when your thinking advises that the most ideal explanation for all of them is fluid water in the pores between stones, you have a story. There is actually little people thirst for even more, when it comes to planetal science, than water on Mars. Why carries out the possibility produce such exhilaration-- and what performs this brand-new study include in the tale?