Researchers using DNA testing identify four additional crew members from Sir John Franklin’s 1845 Arctic expedition. The work, led by anthropologists at the University of Waterloo, analyzes DNA extracted from skeletal remains found from the expedition. Scientists compare these genetic samples with DNA donated by living descendants of relatives of sailors believed to have been on the voyage. The matches allow researchers to confirm the identities of four men whose names were previously uncertain. One of the newly identified sailors has been the subject of historical debate for more than a century, which the results now help resolve. Collectively, the new identifications raise the total number of Franklin expedition sailors confirmed through DNA matching to six. The research also contributes to a broader effort to place individual crew members within the expedition’s record and to better understand what happened during the failed voyage.