A small settlement in Greenland is holding its collective breath as an iceberg of titanic proportions drifts dangerously close to shore — and residents’ homes. For days now, the freakishly large frozen mass has been on a collision course with tiny Innaarsuit — leading local authorities to issue a warning to residents. If the fearsome frosty float were to make contact with the shore or break apart, potential damage and injuries could follow, officials said. Though it’s unlikely any broken ice chunks would fall directly on land, the impact of pieces of plummeting permafrost would create massive waves, which could...