.THE function of Bayesian inversion to a stable of lithologic guidelines in an assessment of seismic data hardly seems the stuff of titles. Yet when the seismic information you are assessing stemmed from Mars, and also when your reasoning suggests that the best explanation for them is liquefied water in the pores in between rocks, you possess an account. There is little people crave a lot more, when it comes to planetary science, than water on Mars. Why does the prospect provoke such enjoyment-- and also what performs this brand-new study contribute to the account?