The devastation of the COVID-19 pandemic may have left a significant mark on our brains, even if we didn't get sick. Fatal cases of COVID-19 look scarily like old age in the brain, and now, new research suggests that the mental, social, and financial stresses of the pandemic may have aged our brains as well. A team led by researchers at the University of Nottingham trained an AI model to recognize healthy aging in the brain, using the data of more than 15,000 adults in the UK Biobank. The algorithm was then used to analyze the brain ages of two...