The more we learn about Saturn's moon Enceladus, the more compelling a destination it becomes. New research from the Cassini Cosmic Dust Analyzer shows that the oceans of liquid water under the ice contain large amounts of inorganic phosphorus as well as ammonium, chemicals that can be used by life. For example, there are species of methanogen archaea that could thrive in this environment and could even be the source of some of these chemicals. We've got to go back!