T-SERVICE / SCIENCE PHOTO LIBRARY T-SERVICE / SCIENCE PHOTO LIBRARY
Ape carrying its young, thermogram. 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 (coldest, 20 degrees Celsius) through yellow and orange and purple to dark blue (warmest around 36 degrees Celsius).
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