.THE app of Bayesian contradiction to a range of lithologic criteria in an evaluation of seismic information barely seems right stuff of headings. But when the seismic data you are actually assessing come from Mars, and when your reasoning proposes that the most ideal illustration for all of them is actually liquefied water in the pores between stones, you have a story. There is dwarfs crave extra, when it involves worldly scientific research, than water on Mars. Why does the possibility provoke such excitement-- as well as what does this brand new study include in the account?