1) How firm is the data ;-) this week ;-) , (ya gotta love how fast & furrious new info is coming in these days), that there IS an ocean under all that ice? Last I read opinions were fairly split between "Pretty sure there's an ocean down there" & "Naw, more like a slushy mush. Picture a very big Slurpy". 2) If there IS an ocean down there, what would the pressures be like just under 90 + miles of ice considering that, being so much smaller than Earth, the gravity would be much lower. 3) How deep is deep? How deep would the ocean be, how would that compare with the depths of Earth's oceans, and again, given the lower gravity, how would pressures compare between the deepest parts of Earth's oceans, and the deepest parts of Europa's oceans? 4) How warm is "warm"? Obviously if there's a liquid ocean it's gotta be comparitively toasty for the moon of one of the outer planets. But how warm? Just barely above freezing for salt water kind of warm? Where would the warmest place on Europa be, just under the ice, the very bottom of the ocean, no one has the very slightest clue? 5) How would radiation levels compare to those on Earth? I'd imagine that 90+ miles of ice and one hell of a lot of water would shield things quite nicely from the hellish radiation of Jupiter, then again maybe not.