this results in the unique months-long phenomena of the "midnight sun" with 24-hour daylight in the summer and the "Polar Night" of winter, when the sun does not rise above the horizon for months ...
Of 73 documented attacks by polar bears from 1870 to 2014 in Canada, Greenland, Norway, Russia and the United States — which killed 20 people and injured 63 — 15 occurred in the final five ...