The thermal evolution of the permafrost in the sedimentary section of the Tyumen superdeep SG-6 well has been numerically reconstructed using the ICE2020 software package, which is part of the GALO flat basin modeling system. The thermal evolution of the sedimentary strata in the last 3.5 My is considered as the final stage of the basin modeling, whose formation began with continental rifting in the Late Permian. Abrupt climate changes in the late Pliocene–Holocene led to a decrease in the rock temperature by 15–20°C in the upper 1–1.5 km of the SG-6 sedimentary section. The maximum thickness of the permafrost in the study area was about 711 m, reached 2.6 Mya. The maximum thickness of the permafrost for the last ice age (23–18 thous and years ago) was 412 m, reached about 14.5 thousand years ago. According to our modeling, the modern base of the permafrost is at the depth of 311 m and is degrading with the rate about 13 m/1000 y. The results of our calculations with a database of climatic data limited to the last 50 and 100 thousand years differ markedly from the modeling results with the complete database for the last 3.5 My.

The paleoclimate evolution curve of the South Kara Sea basin over the past 250 Myr, which is necessary for numerical reconstruction of its thermal history, was plotted using data from a large number of works devoted to studying of the paleoclimate of the Arctic sector of the West Siberian Basin. For the period from 260 to 65 Mya, the construction of the paleoclimate curve was based on a series of paleotectonic reconstructions of the studied area. The reconstruction of the climatic history of the Cenozoic was based on a detailed study of climate variations in Eurasia over the past 65 Myr. The history of sharp climate fluctuations in the last 3.5 Myr was based on information from a large number of works devoted to studying of the regional paleoclimate in the Pliocene-Quaternary. Studies published in the literature speak in favor of the limited size of the glacial covers formed within the South Kara basin. This makes it possible to neglect the effect of the porosity of sedimentary rocks from the glacial cover load in comparison with the similar effect of the load of sediments removed by erosion in the Miocene. Any correction to the paleoclimatic data due to the thermal influence of the ice sheet with its limited thickness should not exceed the error in determining the data themselves. Peculiarities in the change in temperature and the salinity of pore waters with depth determine the existence of various forms of permafrost in the shelf areas of the Arctic seas.

The reason for writing this article was the off-site meeting of the museology section of the Moscow Society of Naturalists on December 22, 2022, to get acquainted with the exhibition «Past and Present of the Fauna of the Vladimir Region» permanently operating in the House of Culture in Strunino. The initial task of the paper was to analyze the situation with the moving to a new location of the well-known scientific, educational and entertainment museum «Ice Age» in Moscow. The museum was established in 2004 on the basis of the richest paleontological specimens collected by F.K. Shidlovsky National Alliance during multiple expeditions to the northeast of Yakutia, Chukotka, Altai and the Southern Urals. In 2004–2014, the museum functioned as a scientific and exposition center in pavilion No. 71 at the All-Russian Exhibition Center, which not only popularized knowledge about the animals of the Ice Age, but also provided unique exhibits for research by paleontologists. After several years of searching, the creator of the museum finally found a suitable place to accommodate large exhibits. It was necessary to decide how, by continuing the comprehensive educational and research activities, to ensure a wide attendance of the museum in a place remote from Moscow. Thorough studying of the information showed how much the task is broader and more serious than it seemed at first glance. The activity of an outstanding energetic person, devoted to a significant social goal, turned out to be connected with roots deeply rooted in the historical past of the country. Support for a specific undertaking has become important for the implementation of a comprehensive project of the museum, cultural, scientific and educational nature, up to the prospects for the development of the region. And at the same time, the identified problem can be considered as an example of a person’s involvement in the history of the country and responsibility for his/her actions.