ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY. ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY.
Thermogram, or heat image, of a squash player after a game. The colour coding runs from yellow & white at the hottest extreme & purple & black at the coldest. The face & knees show the hottest patches (white) & are surrounded by large areas of yellow. Small areas of the body are coded in the cooler colours of red & blue.
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