Cold water, warm hearts

As the winter chill sets in, throngs of Europeans are heading each week to the nearest pond, lake or coastline to dunk themselves voluntarily in freezing cold water. Cold swimming has centuries of history on this continent, but why do it? This week we're delving into the science of why it makes us feel good — but also why it helps so many people through difficult times, with the help of Katharina Smets, audio maker and proud member of Antwerp's biggest cold plunge club. We're also talking about the Vatican's Christmas tree drama and a festive inflation-busting policy in Greece.