.THE function of Bayesian contradiction to a variety of lithologic guidelines in an analysis of seismic records rarely seems right stuff of titles. But when the seismic data you are actually examining stemmed from Mars, and when your thinking suggests that the best description for all of them is liquid water in the pores in between rocks, you possess an account. There is little people thirst for even more, when it concerns earthly science, than water on Mars. Why performs the prospect provoke such pleasure-- and also what performs this brand new investigation contribute to the tale?