There is strong circumstantial evidence for a global liquid ocean under the ice surface of Europa, and, to a lesser degree, Ganymede and Callisto. If so, it is likely that life has evolved within each of these moons. Let’s speculate that life has arisen and advanced to the multicellular level and brainstorm about what form it might have taken, what sort of ecology might have formed in support of it, and how technologically advanced it may have (can) become.
What is the level of visible light? Is the level of visible light enhanced by luminescent organisms? What effect does the radiation frequency of peak intensity have on the kind of sensory organs that would evolve? Could an “atmosphere” form between the solid ice surface and the ocean surface? Assuming the more “technologically” advanced critters are crustacean-like (crabs, lobsters, etc.,) or fish-like (gills and fins with fingers), what would limit their cultures and shape their view of the universe? Would the rate of speciation be higher or lower than that on earth? :unsure: :unsure:
Does this expand the definition of life supporting zones around stars? Quite a few planets have been "discovered" between 0.8 and 1.4 AUs from their parent stars. These planets are of sizes on the order of that of Jupiter and are likely to have moons of sizes on the order of Jupiter's Gallilean moons. h34r:
Boy! it's getting crowded. Can we hope to compete?