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Tree of Life
Plant Flower, Tree
Invertebrate Octopus, Ant, Bee, Butterfly, Spider, Lobster
Vertebrate Fish, Seahorse, Ray, Shark, Frog, Turtle, Tortoise, Dinosaur
Bird, Ostrich, Owl, Crow, Parrot
Mammal Bat, Rabbit, Giraffe, Camel, Horse, Elephant, Mammoth
Whale, Dolphin, Walrus, Seal, Polar Bear, Bear, Cat, Tiger, Lion, Dog, Wolf
Monkey, Chimpanzee, Human
These are organized by a classification scheme developed exclusively for Cosma. More…
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
Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.
- Not so fast: Modeling shows ecosystems can...on November 17, 2020 at 3:38 pm
A Skoltech researcher and her colleagues from Canada and Chile experimented with mathematical evolutionary models to explore how well ecosystems can keep up with changing environmental conditions—a question all too relevant in our current ecological situation. They found that the speed of this change ultimately holds the key to species survival, so just slowing down climate change, habitat degradation and other similar processes can already lead to better outcomes for the ecosystems. The […]
- The connectivity of multicomponent fluids in...on November 12, 2020 at 1:27 pm
A team of researchers has discovered more about the grain-scale fluid connectivity beneath the Earth's surface, shedding new light on fluid circulation and seismic velocity anomalies in subduction zones.
- How ancient dust from the sea floor helps to...on November 9, 2020 at 3:54 pm
During the last Ice Age about 20,000 years ago, iron-containing dust acted as a fertilizer for marine phytoplankton in the South Pacific, promoting CO2 sequestration and thus the glacial cooling of the Earth. But where did the dust come from? Researchers led by Dr. Torben Struve, geoscientist at the University of Oldenburg, Germany, have investigated this open question of climate history, which is also relevant with respect to current climate change.
- Game 'pre-bunks' political misinformation by...on November 6, 2020 at 8:19 am
A short online game in which players are recruited as a "Chief Disinformation Officer", using tactics such as trolling to sabotage elections in a peaceful town, has been shown to reduce susceptibility to political misinformation in its users.
- Poor US pandemic response will reverberate in...on November 3, 2020 at 6:57 pm
Much has been written about the U.S. coronavirus response. Media accounts frequently turn to experts for their insights—commonly, epidemiologists or physicians. Countless surveys have also queried Americans and individuals from around the world about how the pandemic has affected them and their attitudes and opinions.