Mother Nature Network: Springtime: the time for flowers, newborn animals and snow. Nearly half of the United States is currently covered in snow, as is most of Canada, as can be seen in this image from the National Oceanic and Atmospheric Administration. That's the largest extent of snow cover at this point in the season in at least 10 years, according to NOAA. Much of the snow came from a massive spring blizzard that dropped snow throughout the Midwest and East Coast, breaking records in many cities. The town of...