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Baer's text is introduced with detailed comments and references on additional 66 pages written by the Estonian historian Erki Tammiksaar.

The editor added to the facsimile reprint a preface in English, two colour permafrost maps of Eurasia and some figures of permafrost features.

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The full text of Baer's original work is available online (234 pages). Thus in 2001 the discovery of the typescript from 1843 in the library archives of the University of Giessen and its annotated publication was a scientific sensation. These facts were completely forgotten after the Second World War.

The Russian Academy of Sciences honoured Baer with the publication of a tentative Russian translation of his study in 1942. However, from 1838 onwards, Baer published several individual publications on permafrost. But it remained lost for around 150 years. This world's first permafrost textbook was conceived as a complete work and ready for printing in 1843. He was teaching at the University of KГ¶nigsberg and became a member of the St Petersburg Academy of Sciences. BaerвЂ™s detailed study consists of 218 pages and was written in German language, as he was a Baltic German scientist. In 1843, BaerвЂ™s original study вЂњmaterials for the study of the perennial ground-iceвЂќ was ready to be printed. However, Russian scientists also realized, that Karl Ernst von Baer must be given the attribute 'founder of scientific permafrost research'. Some Russian authors relate permafrost research with the name Alexander von Middendorff (1815вЂ“1894). In contrast to the relative dearth of reports on frozen ground in North America prior to World War II, a vast literature on basic permafrost science and the engineering aspects of permafrost was available in Russian. Southern limit of permafrost in Eurasia according to Karl Ernst von Baer (1843), and other authors. As global warming heats the ecosystem and causes soil thawing, the permafrost carbon cycle accelerates and releases much of these soil-contained greenhouse gases into the atmosphere, creating a feedback cycle that increases climate change. Permafrost frequently contains large amounts of biomass and decomposed biomass that has been stored as methane and carbon dioxide in the permafrost, making the tundra soil a carbon sink. Permafrost is formed from ice holding various types of soil, sand, and rock in combination. Permafrost frequently occurs in ground ice, but it can also be present in non-porous bedrock. It can also be located on mountaintops in the Southern Hemisphere and beneath ice-free areas in the Antarctic. Around 15% of the Northern Hemisphere or 11% of the global surface is underlain by permafrost, including substantial areas of Alaska, Greenland, Canada and Siberia. Some of the most common permafrost locations are in the Northern Hemisphere. It can be from an inch to several miles deep under the Earth's surface. Permafrost does not have to be the first layer that is on the ground. Permafrost is ground that continuously remains below 0В вЊ (32В вЏ) for two or more years, located on land or under the ocean. Slope failure of permafrost soil, revealing ice lenses.

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