.THE function of Bayesian inversion to a variety of lithologic parameters in an assessment of seismic information barely appears right stuff of headings. Yet when the seismic data you are examining originated from Mars, and when your reasoning proposes that the greatest description for them is fluid water in the pores between stones, you have an account. There is actually little people crave a lot more, when it relates to planetal science, than water on Mars. Why does the possibility prompt such pleasure-- and what does this new research study add to the story?