Search results
Results from the WOW.Com Content Network
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 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 ...
The brown bear (Ursus arctos) is a large bear native to Eurasia and North America. It is one of the largest land carnivorans, rivaled in size only by its closest relative, the polar bear, which is much less variable in size and slightly bigger on average. The brown bear is a sexually dimorphic species, as adult males are larger and more ...
Arctodus is an extinct genus of short-faced bear that inhabited North America during the Pleistocene (~2.5 Mya until 12,800 years ago). There are two recognized species: the lesser short-faced bear (Arctodus pristinus) and the giant short-faced bear (Arctodus simus). Of these species, A. simus was larger, is known from more complete remains ...
The heaviest land mammal is the African bush elephant, which has a weight of up to 10.1 t (11.1 short tons). It measures 10–13 ft at the shoulder and consumes around 230 kg (500 lb) of vegetation a day. Its tusks have been known to reach 2.7 m (9 ft) in length, although in modern populations they are most commonly recorded at a length of 0.6 ...
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 cave bear had a very broad, domed skull with a steep forehead; its stout body had long thighs, massive shins and in-turning feet, making it similar in skeletal structure to the brown bear. [15] Cave bears were comparable in size to, or larger than, the largest modern-day bears, measuring up to 2 m (6.6 ft) in length. [16]
It can reach a shoulder height of over 1.6 m (5.2 ft) and total length of as much as 3.1 m (10 ft). The heaviest wild polar bear weight recorded was 1,002 kg (2,209 lb). The Kodiak bear, a brown bear (U. arctos) subspecies, rivals the polar bear in size, but is slightly smaller. It has a similar body length with the largest confirmed wild ...