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27.3 MB (1.6 MB compressed)
3726 x 2559 pixels
31.5 x 21.6 cm ⏐ 12.4 x 8.5 in (300dpi)
PEKKA PARVIAINEN / SCIENCE PHOTO LIBRARY PEKKA PARVIAINEN / SCIENCE PHOTO LIBRARY
Mammatus cloud formation. Hanging protruberances known as "mamma" seen under a thick and heavy cumulonimbus thundercloud. These pouch formations undergo rapid swirling movements and indicate extreme turbulence and convection within the storm cloud.
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