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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).
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.
The polar bear and the brown bear form a close grouping, while the relationships of the other species are not very well resolved. [ 2 ] A more recent phylogeny based on the genetic study of Kumar et al. (2017).
Susan Janet Crockford is a Canadian zoologist known for her research and publications on polar bears. From 2004 to 2019 she was an adjunct professor in Anthropology at the University of Victoria. [1] Crockford has gained attention for her blog posts on polar bear biology, in which she argues that polar bears are not threatened by climate change ...
The Asiatic black bear and the polar bear used to be placed in their own genera, Selenarctos and Thalarctos; these are now placed at subgenus rank. Subfamily Ursinae Fischer de Waldheim, 1817 †Aurorarctos Jiangzuo & Flynn, 2020 †Aurorarctos tirawa Jiangzuo & Flynn, 2020; Helarctos Horsfield, 1825. Helarctos malayanus (Raffles, 1821) – sun ...
Wilbär is a polar bear who was born in captivity at the Wilhelma Zoo in Stuttgart, Germany on December 10, 2007. [1] Wilbär made his first public appearance on April 16, 2008, swimming alongside his mother. His name comes from combining the name of the zoo with the German word for bear . [1] [2] Zoo officials have registered the name as a ...
Taylor has published over 5150 scientific papers on polar-bear-related topics, and he has worked in the field on most of the world's polar bear populations. He was a coauthor of the 2008 Committee on the Status of Endangered Wildlife in Canada (COSEWIC) Assessment and Update Status Report for polar bears. From 2004 to 2008, he was also manager ...
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.