38.7 MB (4.3 MB compressed)
3268 x 4135 pixels
27.7 x 35.1 cm ⏐ 10.9 x 13.8 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Insulation. Coloured scanning electron micrograph of fibres of a dacron polyester material used in sleeping bags. The core of each fibre has up to seven air cavities, increasing the thermal insulation properties. Magnification: x300 at 6x7cm size.
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