25.1 MB (2.7 MB compressed)
3329 x 2640 pixels
28.2 x 22.4 cm ⏐ 11.1 x 8.8 in (300dpi)
EYE OF SCIENCE / SCIENCE PHOTO LIBRARY EYE OF SCIENCE / SCIENCE PHOTO LIBRARY
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Scanning electron micrograph (SEM) of two spores from a stag's-horn clubmoss (Lycopodium clavatum). These spores were once collected as lycopodium powder and used for photography flashes and as a moisture-absorbing skin powder. Spores are the asexual reproductive cells of a clubmoss plant. The stag's-horn clubmoss is found on mountain moors, heaths and grasslands. Lycopod mosses were widespread during the Carboniferous period (345-280 million years ago). Magnification: x1,700 when printed at 10 centimetres wide.
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