in the past decade, it has become clear that the brain’s default network supports mental simulations of other hypothetical events too, such as episodes that could have occurred in one’s past but didn’t, atemporal routine activities (eg, brushing teeth), mind-wandering, spatial navigation, imagining other people’s thoughts (mentalising) and narrative comprehension, among others. As a result, researchers now think that what unifies this common neural network isn’t just mental time-travel, but rather a more general kind of psychological process characterised by being self-relevant, socially significant and episodically, dynamically imaginative