50.6 MB (1.8 MB compressed)
4863 x 3638 pixels
41.1 x 30.7 cm ⏐ 16.2 x 12.1 in (300dpi)
POWER AND SYRED / SCIENCE PHOTO LIBRARY POWER AND SYRED / SCIENCE PHOTO LIBRARY
Sponge spicules. Coloured scanning electron micrograph (SEM) of spicules from a sea sponge. Sponges are primitive aquatic organisms that filter food from the water. They are a loose aggregation of cells supported by spicules and needles composed of silica or calcium. Magnification: x25 when printed 10 centimetres wide.
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