In 2008, an unexpected find was revealed in a coal mine in the Ukrainian city of Donetsk. The enigmatic device that resembles an old wheel may still be locked inside the mine due to the structure of the sandstone in which it was lodged.
Workers were surprised to observe what appeared to be a wheel impression above them on the sandstone roof of the tunnel they had just excavated while drilling the coal coking stratum known as J3 ‘Sukhodolsky’ at a depth of 900 meters (2952.76 ft) below the surface.
Fortunately, then-Deputy Chief V.V. Kruzhilin photographed the unique print and shared it with mine foreman S. Kasatkin, who transmitted the funding news and the spectacular images.
The Rostov region around Donetsk is situated on carboniferous rock dated between 360 and 300 million years ago, and coking coals widely scattered stem from the middle to late Carboniferous, meaning that the print could be as old as 300 million years.

Many theorists believe that an actual wheel became stuck millions of years ago and dissolved over time due to diagenesis, as is familiar with fossil relics.
The following is an excerpt from a letter written by S. Kasatkin (translated from Ukrainian) in reaction to his account about seeing the strange impression of the wheel discovered by his team of miners in 2008 — he was dissatisfied with the modest case produced in connection with the discovery:
This is not a public relations campaign. In due course (2008), we, as a team of engineers and workers, requested that the mine director invite scientists for a detailed examination of the object. Still, the director, acting on the instructions of the then-mine owner, forbade such conversations and instead only ordered to speed up the work (…).”
“I have links with the persons who unearthed these prints and the photographers who photographed them.” We have several witnesses. As you know, mine access is strictly regulated, and obtaining such a license is challenging and complicated.”
“The wheel was carved out of the sandstone (…).” Some attempted to cut the treasure with hammers (picks) and bring it safely to the surface, but the sandstone was so strong (hard) that they left it in place for fear of harming the print. The mine is closed (officially since 2009), and access to the object is impossible – the equipment has been disassembled, and the layers have been inundated.”
Despite the challenges in checking the details at the mine, the images remain vital proof of this aberrant archaic mark, with just this written statement and that of the other witnesses.
Furthermore, according to Kotkin, the miners discovered another impression of the wheel around the same time and in the same tunnel, but it was much smaller.
As a result, if the photographic evidence is genuine (as all of the evidence suggests), one needs to wonder how an artificially-made wheel became entrenched in such old layers when, according to traditional history, no other advanced civilization like ours has yet arisen.