.THE APPLICATION of Bayesian inversion to a variety of lithologic parameters in an analysis of seismic records hardly seems the stuff of headlines. Yet when the seismic data you are actually evaluating stemmed from Mars, and also when your reasoning recommends that the very best description for all of them is actually fluid water in the pores between stones, you possess a story. There is little people crave even more, when it comes to global science, than water on Mars. Why carries out the possibility prompt such enjoyment-- and what does this brand-new study add to the story?