The Britannic, a hospital ship during WWI, sank in 1916 after striking a mine in the Aegean Sea. Like its famous sibling, the Titanic, its wreck continues to attract explorers more than a century after it went down. #DrainTheOceans is now streaming on Disney and Hulu. | National Geographic History

DEADLY WW2 GERMAN SEA MINE UP CLOSE Take a close up look at this WW2 German EMC Type II moored sea mine on display at the Operation Dynamo Museum in Dunkirk. One of the most frequently used and adaptable weapons against Allied shipping during the Second World War, there were six different types of these Einheitsmine Contact mines created with variations in their types of moorings, depth they would operate at, and the types and number of ‘horns’ which triggered them. This is an early/mid war vers