South African metal groove ball

South African miners dig out some mysterious metal spheres.

How big is it? What's its weight?
The diameter is about 2.54 centimeters. Its weight is unkown It was made of metal.

What's its style?
There are two styles. Such as, while some one is solid blue metal and the others is hollow.

Where is it?
South african

Other things
The balls does not smell and cannot be broken by hand.

who?
From few years ago, South African miners dug out some metal balls.You can't found it without the help of the scientists.

where ?
These metal balls are  discovered in the Precambrian.

when?
2 billion 800 million years ago.

How did it formation
Some are nature formed,or some are people carve grooves on the balls before burying them underground.

Quality
The center of gravity of each sphere is kept balanced.

The ball‘s center is a sticky substance, when it in the air that it will become to oxygen.

Its optical shape
It seems that it has a heavier appearance.

Its touch
In fact, the kernel is not so heavy that it can not be broken by hand.

Its smell
As scientists thinks ,it is tasteless

Represent
Nowadays, it is believed that they represent a prehistoric civilization.

Effect
According to this ball,scientists guess conclusion that human source maybe existed 2 billion 800 years ago.

Another name
The max Christian ball.And Klerksdorp Sphere.

Thanks
Thanks for watching this amazing ball ^0^ !!!