Polar bears are incredibly well insulated with a layer of blubber that can be up to 10cm thick covered with another 15cm of fur.

Polar bears lose so little heat to their environment that they are almost invisible to thermal imaging cameras. But a University of Buffalo study found that polar bears have also evolved genes that produce more nitric oxide than other bear species. Nitric oxide is a signaling molecule and one of the mechanisms it controls is whether cells use their available nutrients to produce metabolic energy, or simply convert it into body heat. Polar bears seem to be able to divert more of their body’s resources into generating heat. This relies on them getting enough fuel for this process, and adult polar bears have a high calorie diet; they mostly eat seal blubber.
Polar bears are incredibly well insulated with a layer of blubber that can be up to 10cm thick covered with another 15cm of fur.

Polar bears lose so little heat to their environment that they are almost invisible to thermal imaging cameras. But a University of Buffalo study found that polar bears have also evolved genes that produce more nitric oxide than other bear species. Nitric oxide is a signaling molecule and one of the mechanisms it controls is whether cells use their available nutrients to produce metabolic energy, or simply convert it into body heat. Polar bears seem to be able to divert more of their body’s resources into generating heat. This relies on them getting enough fuel for this process, and adult polar bears have a high calorie diet; they mostly eat seal blubber.
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The study also found that polar bears have a higher metabolic rate than other bear species, which is likely to be a result of their evolution in a cold environment.

The study was published in the journal Molecular Biology and Evolution.

Image: Polar bear by NAME_1.
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Polar bears are incredibly well insulated with a layer of blubber that can be up to 10cm thick covered with another 15cm of fur.

Polar bears lose so little heat to their environment that they are almost invisible to thermal imaging cameras. But a University of Buffalo study found that polar bears have also evolved genes that produce more nitric oxide than other bear species. Nitric oxide is a signaling molecule and one of the mechanisms it controls is whether cells use their available nutrients to produce metabolic energy, or simply convert it into body heat. Polar bears seem to be able to divert more of their body’s resources into generating heat. This relies on them getting enough fuel for this process, and adult polar bears have a high calorie diet; they mostly eat seal blubber.
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Polar bears are also very good at conserving energy. They can go for months without eating, and they can sleep for up to 8 months of the year. They can also swim for days at a time, and they can run at speeds of up to 40km/h.

Polar bears are the largest land carnivores in the world, and they are also the largest bears. They can weigh up to 1,000kg and stand up to 3m tall. They are also the only bear species that is completely carnivorous.

Polar bears are found in the Arctic, and they are the only bear species that is found in the Arctic. They are also the only bear species that is found in the Arctic.

Polar bears are found in the Arctic, and they are the only bear species that is found in the Arctic. They are also the only bear species that is found in the Arctic.

Polar bears are found in the Arctic, and they are the only bear species that is found in the Arctic. They are also the only bear species that is found in the Arctic.

Polar bears are found in the Arctic, and they are the only bear species that is found in the Arctic. They are also the only bear species that is found in the Arctic.

Polar bears are found in the Arctic, and they are the only bear species that is found in the Arctic. They are also the only bear species that is found in the Arctic.

Polar bears are found in the Arctic, and they are the only bear species that is found in the Arctic. They are also the only bear species that is found in the Arctic.

Polar bears are found in the Arctic, and they are the only bear species that is found in the Arctic. They are also the only bear species that is found in the Arctic.

Polar bears are found in the Arctic, and they are the only bear species that is found in the Arctic. They are also the only bear species that is found in the Arctic.

Polar bears are found in the Arctic, and they are the only bear species that is found in the Arctic. They are also the only bear species that is found in the Arctic.

Polar bears are found in the Arctic, and they are the only bear species that is found in the Arctic. They are also the only bear species that is found in the Arctic.

Polar
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Polar bears are incredibly well insulated with a layer of blubber that can be up to 10cm thick covered with another 15cm of fur.

Polar bears lose so little heat to their environment that they are almost invisible to thermal imaging cameras. But a University of Buffalo study found that polar bears have also evolved genes that produce more nitric oxide than other bear species. Nitric oxide is a signaling molecule and one of the mechanisms it controls is whether cells use their available nutrients to produce metabolic energy, or simply convert it into body heat. Polar bears seem to be able to divert more of their body’s resources into generating heat. This relies on them getting enough fuel for this process, and adult polar bears have a high calorie diet; they mostly eat seal blubber.
user
The study also found that polar bears have a higher metabolic rate than other bear species, which is likely to be a result of their evolution in a cold environment.

The study was published in the journal Molecular Biology and Evolution.

Image: Polar bear by NAME_1.
assistant