Geography of Canada Canada's territory as sparsely populated wilderness; Canada's population density is 3.5 people/km (9.1/mi), among the lowest in the world. Despite this, 79.7 percent of Canada's population resides in urban areas, where population densities are increasing. Canada shares with the U.S. the world's longest undefended border at ; are with Alaska. The Danish island dependency of Greenland lies to Canada's northeast, separated from the Canadian Arctic islands by Baffin Bay and Davis Strait. The French islands of Saint-Pierre and Miquelon lie off the southern coast of Newfoundland in the Gulf of St. Lawrence and have a maritime territorial enclave within Canada's
Baffin Island in the middle of the island, has been retreating since at least the early 1960s, when the Geographical Branch of the then-Department of Mines and Technical Surveys sent a three-man survey team to the area to measure isostatic rebound and cross-valley features of the Isortoq River. Conversely, in the 1970s parts of Baffin Island failed to have the usual ice-free period in the summer. The island has been continuously inhabited by Inuit peoples for centuries. In September 2008, "Nunatsiaq News" reported that a team led by Dr. Patricia Sutherland of the Canadian Museum of Civilization had found archaeological remains of