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The polar bear (Ursus maritimus) is a large bear native to the Arctic and nearby areas. It is closely related to the brown bear, and the two species can interbreed.The polar bear is the largest extant species of bear and land carnivore, with adult males weighing 300–800 kg (660–1,760 lb).
The key danger for polar bears posed by the effects of climate change is malnutrition or starvation due to habitat loss.Polar bears hunt seals from a platform of sea ice. Rising temperatures cause the sea ice to melt earlier in the year, driving the bears to shore before they have built sufficient fat reserves to survive the period of scarce food in the late summer and early fall.
The range of the polar bear encircles the North Pole.. A circumpolar distribution is any range of a taxon that occurs over a wide range of longitudes but only at high latitudes; such a range therefore extends all the way around either the North Pole or the South Pole.
The history of the bears of the Alexander Archipelago is unusual in that these island populations carry polar bear DNA, presumably originating from a population of polar bears that was left behind at the end of the Pleistocene, but have since been connected with adjacent mainland populations through the movement of males, to the point where ...
The polar bear alert team's vehicles are gathering outside, trying to move a bear away from town. "If climate change continues," muses Tee's classmate Charlie, "the polar bears might just stop ...
Two Polar Bears. The Arctic National Wildlife Refuge is directly connected to Polar Bears. These bears are known for traveling in the region to den and give birth. Nearly 50 of these species migrate along the coast to the refuge in September. These bears extend more than 800 miles (1,300 km) along the coast of Northern Alaska and Canada. Due to ...
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