New Zealander Maire Clifford was gazing out the window on a train traveling from London to Edinburgh, Scotland. The train was weaving north out of King’s Cross station, with cityscapes gradually ...

Gazing out the window was only interesting up to a point — and Maire’s boyfriend was out cold, fast asleep in the seat next to her. The train journey was set to take six hours. “I was like, ‘Okay, ...