The darkest time of year at the North Pole is the Winter Solstice, approximately December 21. There has been no sunlight or even twilight since early October. The darkness lasts until the beginning of dawn in early March
Now you can see what's happening in the arctic at http://www.arctic.noaa.gov/gallery_np.html
A railroad tanker car carrying propane traveled over 3,000 feet when it exploded during a train wreck in Illinois, sheering off a steel tower in it's path. It's the longest flight on record for a propane explosion.