“We do live in dangerous times. Some people of course have to live with danger all the time. Naples (ever so brief pause – dramatic effect) lives in the shadow of Vesuvius, which buried Pompeii two thousand years ago – there’s no forgetting that. And at the western edge of the Bay of Naples the Campi Flegrei, or Fields of Fire, lie over a magma chamber that’s undergone massive eruptions in the deep past and which some experts think is moving into a new active phase. The whole area is, in principle, dangerous …” *

* Science in Action, BBC World Service Radio, Friday 2 August 2019