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25.1 MB (1.1 MB compressed)
3630 x 2420 pixels
30.7 x 20.6 cm ⏐ 12.1 x 8.1 in (300dpi)
THIERRY BERROD, MONA LISA PRODUCTION / SCIENCE PHOTO LIBRARY THIERRY BERROD, MONA LISA PRODUCTION / SCIENCE PHOTO LIBRARY
Snottites. These stalactite-like formations are made from biofilms of acidophilic bacteria. They have a mucus-like consistency, hence the common name. The bacteria metabolise sulphur compounds for energy, producing very acidic byproducts.
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