Henry Worsley was a husband, father, and an officer of an élite British commando unit; also a tapestry weaver, amateur boxer, photographer, and collector of rare books, maps, and fossils. But his true obsession was exploration. Worsley revered the Antarctic explorer Ernest Shackleton and he had led a 2009 expedition to the South Pole. But Worsley planned an even greater challenge. At fifty-five, he set out to trek alone to ski from one side of the Antarctic continent to the other, hauling more than three hundred pounds of gear and posting an audio diary by satellite phone. The New Yorker staff writer David Grann wrote about Worsley’s quest, and spoke with his widow, Joanna Worsley, about the painful choice she made to support her husband in a mortally dangerous endeavor.