Mirror: Temperatures at the North Pole rose above freezing point and came close to the melting point on Wednesday; 20 degrees Celsius above the mid-winter norm, the region was hotter than some of the major cities in Europe and the United States. According to ocean measurements from the North Pole Environmental Observatory, the mercury tipped -1.9°C (28.6°F) on Wednesday as the Arctic bathed in an unseasonably warm spell. Weather authorities blamed Wednesday's temperature spike on the freak depression which...