.THE APPLICATION of Bayesian inversion to a stable of lithologic specifications in an evaluation of seismic data barely seems right stuff of titles. But when the seismic data you are actually examining originated from Mars, and also when your thinking suggests that the greatest illustration for all of them is actually fluid water in the pores in between stones, you have a tale. There is dwarfs thirst for more, when it comes to planetal science, than water on Mars. Why performs the possibility produce such excitement-- as well as what performs this new analysis add to the tale?