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The weight of polar bears fluctuates during the year, as they can bulk up on fat and increase their mass by 50 percent. [31] A fattened, pregnant female can weigh as much as 500 kg (1,100 lb). [35] Adults may stand 130–160 cm (4.3–5.2 ft) tall at the shoulder. The tail is 76–126 mm (3.0–5.0 in) long. [10]
The sail area-displacement ratio (SA/D) is a calculation used to express how much sail a boat carries relative to its weight. [1]/ = [() /] = () In the first equation, the denominator in pounds is divided by 64 to convert it to cubic feet (because 1 cubic foot of salt water weights 64 pounds).
Researchers tracked polar bears with GPS system collarsand recorded long-distance swims up to 354 kilometres (220 mi), with an average of 155 kilometres (96 mi), taking up to ten days. [89] A polar bear may swim underwater for up to three minutes to approach seals on shore or on ice floes while hunting.
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Marine mammals are aquatic mammals that rely on the ocean for their existence. They include animals such as sea lions, whales, dugongs, sea otters and polar bears. Like other aquatic mammals, they do not represent a biological grouping. [26] The humpback whale is a fully aquatic marine mammal.
The ulna is estimated to have been 48.5 cm (19 in) long when complete- for comparison, modern subadult polar bear ulnae are 36–43 cm (14–17 in) long. [1] The ulna was dated to the early Weichselian of the Late Pleistocene (~70kya). [2] Of the 16 specimens identified as Pleistocene polar bears, this is the only fossil ascribed to this ...
A polar bear (top) and Syrian brown bear (bottom) An animal, described as a "pale" or "white" bear, was given to Henry by Haakon IV of Norway in 1252. [ 2 ] [ 3 ] The species of the animal is not known definitively, but it was most likely a polar bear ; [ 3 ] polar bears were known as white bears in Britain before the 19th century. [ 4 ]
The Polar Bear Plunge event in Maryland is the largest polar bear plunge in the United States. It is held annually at Sandy Point State Park and raises funds for the Special Olympics. [ 42 ] Sponsored by the Maryland State Police , in 2007, Plungapalooza raised $2.2 million and had 7,400 participants. [ 43 ]