Polar bear. Thermogram of a polar bear (Ursus maritimus). 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 white (5.8 degrees Celsius,coldest) through yellow,red,purple and blue to black (warmest,34.4 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 which insulate it during the winter | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / T-Service |
Taille de l’image : | 688 px × 517 px |
Model Release : | Non requis |
Property Release : | Non requis |
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