People used to joke about this expression as if it was something obviously true, like 'Is the sky blue!'

But Pope Francis has made so many changes, that today, the question is taking on a different nuance.

Rachel Ciano lectures in church history at Sydney Missionary Bible College and joins Dominic Stele to discuss the impact of the Reformation on the Roman Church.

People used to joke about this expression as if it was something obviously true, like 'Is the sky blue!'