.THE app of Bayesian inversion to a stable of lithologic specifications in an evaluation of seismic information rarely appears right stuff of headlines. But when the seismic information you are evaluating arised from Mars, and when your thinking recommends that the very best illustration for all of them is liquid water in the pores between rocks, you possess an account. There is actually little people crave even more, when it relates to wandering science, than water on Mars. Why performs the possibility provoke such enthusiasm-- and what performs this brand-new research contribute to the tale?