An example of one of the study's ultra-processed lunches consists of quesadillas, refried beans and diet lemonade. Participants on this diet ate an average of 508 calories more per day and gained an average of 2 pounds over two weeks. Hall et al./Cell Metabolism hide caption

Hillary and Julie Goodridge with their daughter, Annie (center). "It was a lot of stress for all of us, all the time," says Annie, now 23, of her parents' involvement in the lawsuit that made same-sex marriages legal. "When you have to be on all the time, it's hard to turn yourself off." Meredith Nierman/WGBH hide caption

Quinn Christopherson is the winner of the 2019 Tiny Desk Contest. Ash Adams/Courtesy of the artist hide caption

Architect I.M. Pei stands in front of the Louvre museum's glass pyramid in Paris, just before the structure's inauguration in March 1989. Pierre Gleizes/AP hide caption