Every new tool changes the way we think. The calculator, for instance, freed us from tedious arithmetic, the GPS relieved us of remembering directions—and now, AI promises to shoulder much of our writing and reasoning. But at what cost?  A recent study suggests that relying on ChatGPT for simple tasks like essay writing may impact

Maria Knöbel, MBBS, knew she should be sleeping, but after long days making clinical decisions as a general practitioner, she often stayed up late to read. “It was the only time of the day that was mine,” says Knöbel, medical director and co-founder of Medical Cert UK. But pushing her sleep back was starting to