The Royal Institution Annual Christmas Lectures to Young People.
2: The Outer Solar System and Life The Big Planets - Jupiter, Saturn and Uranus - used to be thought too far from the Sun, and thus too cold, to be possible sites for the evolution of life.
But Professor Carl Sagan , among other experts on the origin of life, has actually made a Jupiter atmosphere in his laboratory and in this lecture he explains that life on Jupiter is not out of the question. Knowledge of the mighty hydrogen-rich planets has already been transformed by spacecraft fly-bys: other probes, now in the design stage, may settle the question of life in the 1980s.