Were Carl Sagan and Edwin Salpeter right? In 1976 they suggested that the warm layers of Jupiter’s hydrogen/helium outer layers of gas could be home to huge living “…gas-filled balloons…”, sinkers, and hunters. Is there enough methan there to act as a carbon source? Isn’t it a bit windy up there? Where is life going to get a foothold . . .er . . . balloon hold to get started?