Polar bear, thermogram

Polar bear, thermogram

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This image is part of the feature ANIMALS IN HEAT

Credit: T-SERVICE/SCIENCE PHOTO LIBRARY

Caption: Polar bear. Thermogram of a polar bear (Ursus maritimus) with its mouth open. A thermogram shows variation in temperature on the surface of an object, measured by the long-wave infrared radiation it emits. The temperature scale is colour-coded and runs from yellow (-1.0 degree Celsius, coldest) through orange and red to blue (warmest, 34.9 degrees Celsius). The polar bear is adapted to live in a cold environment. Heat loss from its ears is reduced because of their diminutive size. The bear also has a seasonal fat layer and thick fur that insulates it during the winter.

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Keywords: animal, bear, biological, biology, calling, coloured, endotherm, endothermy, false-coloured, fauna, heat, homeostasis, infrared, infrared camera, insulation, ir, long-wave infrared radiation, mammal, nature, polar bear, roaring, thermal imaging, thermogram, thermography, ursus maritimus, wildlife, yawning, zoological, zoology

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