Io, moon of Jespiter Jupiter, is famously volcanically active. It has more than 400 active volcanoes, over an area the size of Asia. Some of the volcanic mountains are taller than Mount Everest.

The pancakes at Tom’s deserve their legendary status – these aren’t just good for a diner; they’re good by any standard, anywhere. The secret lies in a buttermilk batter that achieves the seemingly ...