According to Michael Cremo and other researchers of prehistoric culture, these spheres add to a body of evidence suggesting intelligent life existed on Earth long before a conventional view of history places it here.
Cremo has traveled the world gathering information on out-of-place artefacts; he compiled his findings in the popular book, “Forbidden Archaeology: The Hidden History of the Human Race.”
In 1984, while investigating the spheres, he contacted Roelf Marx, curator of the museum of Klerksdorp, South Africa, where some of the spheres are kept. Marx described the spheres as being about 2.8 billion years old, with a very hard surface and a fibrous structure inside. He found them quite strange and puzzling.
Marx wrote, according to Cremo:
Were They Naturally Formed?
Some say the spheres were formed by a natural process of concretion. Concretions are masses of hardened mineral matter.
Some of the so-called Klerksdorp spheres are elliptical in shape with rough ridges around the center. But some are so balanced in shape and proportion, and the grooves around them look so straight and hand-carved, it seems unlikely they were naturally formed, say proponents of the theory that these spheres were made by intelligent beings.
In 2002, the Klerksdorp Museum posted a letter from John Hund of Pietersburg, South Africa, on its website. The claims made in this letter were not verified, according to geologist Paul V. Heinrich, and the letter was later removed. Hund stated that one of the spheres was tested at the California Space Institute, and scientists concluded that its balance “is so fine, it exceeded the limit of their measuring technology.” It was “within one-hundred thousandths of an inch from absolute perfection.”
Heinrich did not find the South African spheres he studied perfectly balanced and shaped…
Here is a video of Micheal Cremo discussing the forbidden history of Planet Earth.