In the frigid North Atlantic, about 20 km. east of Labrador's northernmost coastline, there's a rocky island so small it can't be seen on Google Earth or Google Maps. It measures just 25 by 45 meters—about half a football field. It was first detected in 1973 by Elizabeth A. Flemming, a researcher with the Topographical Survey of Canada, who was poring over raw data from NASA's Landsat 1 satellite, looking for undiscovered geographical features. Finding an island this size off northern Labrador is harder than you might think. Clouds shroud the area most of the summer, and ice disguises its rocky...