dr. stofan. dr. lunine,-- semi study and mentioned for locations, mars, europa, tied in and one of saturn's move-- moons, was that an order of likelihood or do you have a preference a prediction as to where we might most likely find evidence of some form of life? >> that was actually an order moving outward from the sun. >> okay. >> there was no implied order. the question is whether in any environment that can support life does life actually begin, does it form. i don't know the answer to that and no one else does and that's why my view we need to look at all of the bodies where there is very strong evidence, compelling evidence of what's called a habitable environment, an environment where life could ashley be sustained. >> when we find out, but the thickness of the ice is on europa that is time to-- >> there's a lot of ground work that has to be done. we don't know if there are organic molecules. that europa mission will tell us if they are fresh organics in the cracks and if there are that would