March 9, 2017 8:05 pm What the Fluff? What’s so compelling about Fluff? Mimi Graney, author of “Fluff: The Sticky Sweet Story of an American Icon,” discusses the history and popularity of the marshmallow spread. US & World Videos 1:57 Multi-family home catches fire in Mattapan 2:25 Dehydration, heat exhaustion send 10 kids to hospital in Lynn 1:34 Stabbing investigation underway at Carson Beach 2:22 Firefighter charged with stealing dead man's identity 2:26 Holiday travel rush underway as Memorial Day weekend begins