The Copper Nanostructures
In 1991, several coil shaped artifacts were discovered near the banks of Russia’s Kozhim, Narada and Balbanyu Rivers in the Ural mountains. Shaped like copper coils, they were initially determined to be debris from Russian test rockets, until they were tested.
They dated back to 318,000 years ago. Now, no one knows what the hell these copper coils are and how they got there.