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4 days ago · One important adaptation of polar bears to their unique climate is the transparency of their thick fur, which allows sunlight to pass through and reach their black skin, where heat from the sun is then absorbed. Another adaptation is polar bears’ use of only their front limbs when swimming, which is found in no other four-legged ...
- Bearded Seal
bearded seal, (Erignathus barbatus), nonmigratory seal of...
- Brown Bear
Brown bears have an extremely large geographic distribution,...
- Students
Humans probably cause most polar bear deaths by hunting and...
- Beluga Whales
Beluga, a small, toothed whale found mainly in the coastal...
- Kodiak Bear
Kodiak bear, (subspecies Ursus arctos middendorffi),...
- Grizzly Bear
grizzly bear, (subspecies Ursus arctos horribilis), common...
- Kids
The polar bear is a burly white bear that lives in the lands...
- Ringed Seal
ringed seal, (Pusa, or Phoca, hispida), nonmigratory,...
- Bearded Seal
15 hours ago · Numerous fully grown polar bears. Nikita, who was 26 at the time, had traveled to the island on an old gray boat with his father, Sergey Zimov, a renowned Arctic ecologist, and two friends.
4 days ago · The study found that polar bears have approximately 5-10% less genetic diversity than brown bears. This loss of diversity may limit the species’ ability to adapt to rapid environmental changes, raising extinction risks.
1 day ago · Joey, an albino grizzly bear mistaken for a polar bear multiple times, faced repeated relocations between Canada and the Arctic. Conservationists, unaware of his true identity, repeatedly ...
2 days ago · For organisms with very long generation times, as is common in polar regions 15,16, behavioural acclimatisation can maximise an individual’s chance of survival 17,18 in advance of genetic ...
15 hours ago · Compared to polar bears, some key genes involved in carbohydrate metabolism and biological oxidation and cholesterol synthesis showed hypomethylation and higher expression in giant and red pandas, while genes involved in fat digestion and absorption, fatty acid metabolism, lysine degradation, resistance to lipid peroxidation and detoxification showed hypermethylation and low expression.
1 day ago · Climate change is likely to wipe out two polar bear populations on northern Canada’s Hudson Bay as warming temperatures usher in more ice-free days than the bears can survive. Limiting global warming could help the bears endure, researchers wrote in the journal Communications Earth & Environment, but with longer ice-free periods already ...
