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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 ...
Polar bear. 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 species is sexually dimorphic, as ...
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 heating of the planet is pushing Earth's polar bear population to its limit, and according to a new study, they could have fewer than 100 years left before extinction. The carnivorous bears ...
Polar bear attacks on humans are rare but the incident marks at least the second fatality since 2023. Last year, a polar bear emerged from the impenetrable snow ... polar bears could be extinct, ...
Polar bear attacks on humans are extremely rare, but this is at least the second recorded deadly incident involving a polar bear attack since 2023. Last year, a woman and her 1-year-old son were ...
Nanuqsaurus. Nanuqsaurus (meaning "polar bear lizard") is a genus of tyrannosaurine theropod dinosaur known from the Late Cretaceous period (middle Maastrichtian age) Prince Creek Formation of the North Slope of Alaska, having lived roughly 70-68 million years ago. It contains a single species, Nanuqsaurus hoglundi, known only from a partial ...
The Agreement on the Conservation of Polar Bears is a multilateral treaty signed in Oslo, November 15, 1973, by the five nations with the largest polar bear populations: Canada, Denmark (Greenland), Norway (Svalbard), the United States, and the Soviet Union. [1] This treaty was brought about due to increased hunting of polar bears during the ...