The Search For Life in the Outer Solar System

In our search for life elsewhere in the universe Mars and Venus promised so much but have so far, delivered so very little.
And at one point we probably thought that with that our chance of finding life in our solar system was gone.
But over the last two decades we have made the surprising discovery that there are better candidates for habitats that can support extraterrestrial life in the outer solar system.
So what are they and when are we going? 
Kevin Peter Hand is an Astrobiologist, Planetary Scientist with NASA’s Europa Mission and Author of Alien Oceans: The Search for Life in the Depths of Space and he joined Jonathan McCrea to talk about the potential presence of life in outer space.