Resumen de Icy lights
There is a colorful upside to the freezing temperatures sweeping across parts of North America this week. These light pillars--captured here in Moncton, New Brunswick Canada--are more usual in polar regions, but have been seen as far south as Ohio in recent weeks. Light pillars are an optical illusion that results from very cold air causing flat ice crystals, normally found only in high clouds, to occur much closer to the ground. Here, White features the light show in North America
