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Home for polar bears is on the sea ice, where they hunt seals at open leads. Polar bears are found in five nations across the Arctic: the U.S. (Alaska), Canada, Russia, Greenland, and Norway.

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Ringed seals are the most accessible, especially to younger bears and females. Male polar bears also hunt larger bearded seals. They are always alert to other food sources—including vegetation, geese and bird eggs.

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Adult males normally weight 350 to more than 600 kilograms and the adult females are smaller, normally weighing 150 to 290 kilograms.

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The sea ice is vast and ever-changing. The size of a polar bear's range depends on two main factors: the quality of the sea ice and the availability of their seal prey.

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Ursus maritimus is the polar bear's scientific name. It means sea bear.

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Recent findings suggest that polar bears evolved from a common ancestor of the brown bear between 350,000-6 million years ago.

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Polar bears communicate through body language, vocalizations, and scent markings.

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Newborns are 30-35 centimeters long (12 to 14 inches) and weigh little more than half a kilogram.

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Polar bear cubs make a variety of sounds, from hums to groans, to cries when communicating with their mothers.

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A bear that completely relies on the ocean to survive? It’s true! Polar bears are the only species of bear that fully depends on a marine ecosystem.

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We often call the result global warming, but it is causing a set of changes to the Earth's climate, or long-term weather patterns, that varies from place to place.

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Effects that scientists had predicted in the past would result from global climate change are now occurring: loss of sea ice, accelerated sea level rise and longer, more intense heat waves.

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https://polarbearsinternational.rg/

https://climate.nasa.gov/effects/

https://www.nationalgeographic.com/environment/global-warming/global-warming-overview/

Janeth Higuera Gudiño.