Nobody knows when the first of these enigmatic spheres were discovered. They could be proof that there were technologically adept beings on our planet a few million years ago.
These bizarre spheres have been recovered from several mines in South Africa. The age of the layer of earth in which they were buried was about 2.8 billion years.
There is very little information about these Klerksdorp spheres and the South African authorities do not seem to take this discovery seriously.
2.8 billion years ago, our planet was totally different, multicellular life did not exist and the climate was much hotter.
It is unlikely that any civilization lived on Earth at that time. However, we cannot rule out the theory of ancient aliens. Perhaps these advanced beings visited our planet at that time and left behind a series of bizarre artifacts, including these spheres.
At first glance, these spheres are artificially constructed by someone. It is hard to believe that they were formed simply by some natural process.