Jane Murray presented things from a Project perspective. The surface of Europa was the bleakest of prospects: a vacuum-seared wasteland of smooth water ice, so cold that blood and bone would crack like glass, bathed in deadly Jovian radiation. But there were fissures in that ice, dark streaks thousands of kilometers long...Tidal cracks. For beneath the moon’s crust was molten ice, a planet-girdling lava ocean of liquid water. The constant tidal energy of Jupiter, Ganymede, and Io warmed Europa’s ocean to blood heat. Beneath the lacelike web of fractures, a sterile ocean washed a bed of geothermal rock.