Sara, a university professor, describes a typical working day for her as including a barrage of “back-and-forth e-mails, Slack, last-minute Zoom meetings”. These, she says, “prevent me — and everyone in general, I feel — from actually having the time to do deep work, think, write, with high quality”. Above: Marie Curie’s research straddled many decades and involved periods of rest and reflection in the French countryside.