Those people on TV are all excited about that "mysterious ball" that has been discovered in Namibia. It fell from space! It's metallic! We are clueless! We don't know how to use Google! It must be ALIENS! The explanation is easy.
It's just space trash.
The ball, weighing over 6kg and with a circumference of 110cm, is just a pressure vessel, a deposit used in rockets and all those things that humans send to orbit. Probably one of these metal-lined composite-overwrapped pressure vessels.