Flowers carpet the tundra in Nunavut, the northernmost territory of Canada. Photo credit: DB Marsh/Library and Archives Canada via Flickr The researchers report in the Journal of Remote Sensing that examination of 87,000 images captured by the NASA Landsat satellite reveals that Alaska, Quebec and other regions became greener between 1984 and 2012. Landsat, a project also backed by the U.S. Geological Survey (USGS), provides the …