.THE app of Bayesian contradiction to a variety of lithologic specifications in an analysis of seismic records rarely appears the stuff of headings. Yet when the seismic data you are examining arised from Mars, as well as when your reasoning recommends that the most effective illustration for all of them is actually liquefied water in the pores in between rocks, you possess a story. There is dwarfs crave extra, when it comes to global scientific research, than water on Mars. Why does the prospect prompt such enjoyment-- as well as what performs this brand new research contribute to the story?