.THE function of Bayesian inversion to a stable of lithologic parameters in an evaluation of seismic data rarely appears the stuff of titles. Yet when the seismic data you are examining arised from Mars, and also when your thinking suggests that the best description for them is liquid water in the pores in between stones, you possess an account. There is actually little people thirst for more, when it relates to nomadic science, than water on Mars. Why performs the prospect prompt such enjoyment-- and what performs this brand-new investigation add to the tale?