polar bear : a large creamy-white carnivorous bear (Ursus maritimus synonym Thalarctos maritimus) that inhabits arctic regions — Webster
Polar bear (Ursus maritimus) is a hypercarnivorous bear whose native range lies largely within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is a large bear, approximately the same size as the omnivorous Kodiak bear (Ursus arctos middendorffi). A boar (adult male) weighs around 350–700 kg (772–1,543 lb), while a sow (adult female) is about half that size. Although it is the sister species of the brown bear, it has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice and open water, and for hunting seals, which make up most of its diet. Although most polar bears are born on land, they spend most of their time on the sea ice. Their scientific name means “maritime bear” and derives from this fact. Polar bears hunt their preferred food of seals from the edge of sea ice, often living off fat reserves when no sea ice is present. Because of their dependence on the sea ice, polar bears are classified as marine mammals — Wikipedia
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- An upgrade for magnetic resonance methods with a...on August 9, 2022 at 2:26 pm
Researchers determine the structure and dynamics of proteins using NMR (Nuclear Magnetic Resonance) spectroscopy. Until now, however, much higher concentrations were necessary for in-vitro measurements of the biomolecules in solution than found in our body's cells. An NMR method enhanced by a very powerful amplifier, in combination with molecular dynamics simulation, now enables their detection and accurate characterization at physiological concentrations. This is reported by Dennis Kurzbach […]
- During low-ice seasons, some polar bears are...on July 29, 2022 at 2:56 pm
,Holes in sea ice provide the perfect hunting ground for polar bears looking to catch their main food source—seals. So when rising temperatures cause sea ice to melt, polar bears' existence is threatened, making them the poster species for many climate change reports and documentaries. While every population of polar bears is threatened by the loss of this sea ice, some have developed adaptations to survive low-ice seasons. In southeast Greenland, researchers have discovered a unique […]
- What's a shark ordinarily associated with the...on July 25, 2022 at 3:26 pm
A half-blind shark that is typically thought to live in freezing Arctic waters, scavenge on polar bear carcasses and survive for hundreds of years, recently turned up in perhaps an unexpected place—a coral reef off Belize. This marks the first time a shark of its kind has been found in western Caribbean waters off the world's second longest barrier reef.
- Human garbage is a plentiful but dangerous source...on July 20, 2022 at 4:12 pm
More than 50 hungry polar bears invaded the Russian coastal village of Belushya Guba over a period of three months, attracted by the local dump. Some bears entered homes and businesses by ripping doors off hinges and climbing through windows. These invasions have been steadily increasing in Arctic settlements, though this case, in the winter of 2019, was one of the worst. While few people have been attacked, the number of dead bears has climbed.
- Human food waste 'threat' to polar bears: reporton July 20, 2022 at 2:40 pm
The invasion of a remote Russian village by dozens of ravenous polar bears three years ago captured headlines around the world, with images of groups of animals gorging on rubbish in an open garbage dump.
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