The polar region is the area around the North Pole and the South Pole. The Arctic in the north and Antarctica in the south. These are the Earth's coldest regions characterised by vast ice sheets.

KILPISJÄRVI, Finland (AP) — As bubbles rippled across the frigid Finnish lake, diver Daan Jacobs emerged from a hole carved out of the thick, crackling ice. The journey had taken him 8 meters (26 feet ...