.THE app of Bayesian contradiction to a stable of lithologic guidelines in an examination of seismic data barely seems the stuff of headlines. But when the seismic data you are actually analyzing arised from Mars, and when your reasoning proposes that the best explanation for them is actually liquefied water in the pores between stones, you possess an account. There is dwarfs crave extra, when it relates to wandering science, than water on Mars. Why carries out the prospect prompt such enjoyment-- and also what performs this brand new research add to the account?