In 1991, geologists discovered several mysterious machine parts while digging in the mysterious Ural Mountains, at the confluence of the Kozhim, Narada and Balbanyu rivers, while searching for gold deposits. The pieces are embedded in a 100,000-year-old rock and have different machined shapes and different chemical compositions. Ooparts (out of place artifact), as they are often called, are found objects that seem impossibly out of place. These are the most disturbing ooparts discovered so far.
The most mysterious type of parts found are nanohelices, spirals so small they can only be seen with a microscope, down to 1/10,000 of an inch. Based on their estimates, the spirals should be 100,000 to 300,000 years old. They were found between two different layers, the upper layer being 20,000 years old and the one below it being 300,000 years old.
According to the Russian Academy of Sciences the larger pieces are made mostly of copper, but the smaller ones are made of tungsten and molybdenum. Geologists who study the metals said that they are not of natural origin. According to Dr. EW Matvejeva of the Central Research Department of Geology and Exploitation of Precious Metals, they are of "technological origin".
According to the time of the era the artifacts were examined at facilities in Helsinki, St. Petersburg, and Moscow . One of the principal investigators named Dr. Johannes Fiebag died in 1999 and there do not appear to have been any follow-up investigations.
Initially, there was a theory that these were parts that fell from rockets from a launch pad in Plesetsk. A 1996 report ruled out this possibility, saying the pieces were found at too great a depth.
You can see the segment about them on Ancient Aliens here:
The Ural Mountains are full of mysteries, the most famous of which is the Dyatlov Pass incident, where a group of Russian tourists were found dead by a mysterious overwhelming force. The area is known for shamanism and numerous UFO sightings. Is this evidence of extraterrestrial presence hundreds of thousands of years ago? The evidence is still there, but it definitely requires further research!