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. 2020 Nov 12;10(11):278. doi: 10.3390/life10110278

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Peeling mudcracks on pond. (Photo credit: www.discoversinai.net). (b) Mudcrack array (footprints for scale). (Photo credit: CSIRO). (c) Mudcrack peels. (Photo credit: by permission: © Tomas Castelazo, www.tomascastelazo.com, Wikimedia Commons). (d) Mudcracks on foreshore of pond. (Photo credit: © Gary Nafis, with permission; www.CaliforniaHerps.com). (e) Dried sludge (including organics from sewage plant; 0.5 m × 0.5 m). (Photo credit: Hannes Grobe/AWI). (f) Mudcracks and pond. (Photo credit: iStock standard license).