The Free Encyclopedia
The polar bear is a large bear native to the Arctic and nearby areas. Closely related to the brown bear, the polar bear is the largest extant species of bear and land carnivore, with adult males weighing 300 to 800 kg (700 to 1,800 lb). It has white or yellowish fur with black skin and a thick layer of fat. Polar bears live both on land and on sea ice, and usually live solitarily. They mainly prey on seals, especially ringed seals. Male bears guard females during the breeding season and defend them from rivals. Mothers give birth to cubs in maternity dens during the winter. The International Union for Conservation of Nature considers polar bears a vulnerable species. Their biggest threat is climate change as global warming has led to a decline in sea ice in the Arctic. They have been hunted for their coats, meat and other items. They have been kept in captivity and have played important roles in culture. (Full article...)
The Malaspina Glacier is the largest piedmont glacier in the world, situated at the head of the Alaska Panhandle in the United States. It is about 65 kilometers (40 mi) wide and 45 kilometers (28 mi) long, with an area of 3,900 km2 (1,500 sq mi). The glacier is up to 600 meters (2,000 ft) thick in places, with the elevation of its bottom being estimated to be up to 300 meters (980 ft) below sea level. This three-dimensional rendered panoramic map shows the Malaspina Glacier and surrounding area in 2021 – the glacier is at the front and center, with its concentric rings of ice, rubble and meltwater visible. The map was created using a digital elevation model with height samples every 22.5 metres (74 ft) based on United States and Canadian government data. The natural colors represent water, snow and ice, barren land, low vegetation, broadleaf forest, needleleaf forest, and wetland.
Panoramic map credit: Tom Patterson