Escape to the Great Dismal Swamp (2018)认领

　　In the 1800s, southern newspapers ran ads seeking runaway slaves suspected of taking refuge in a vast wetland called the Great Dismal Swamp. For decades, scholars have sought proof that the reports were true, and now they finally have it. See how a team of archaeologists is using new discoveries and modern dating methods to piece together this lost part of American history. The...