Not getting enough AM Coast to Coast lately? Get you mystery fix for the day here. Here is an example of one of the puzzling artifacts:
Over the last few decades, miners in South Africa have been digging up mysterious metal spheres. Origin unknown, these spheres measure approximately an inch or so in diameter, and some are etched with three parallel grooves running around the equator. Two types of spheres have been found: one is composed of a solid bluish metal with flecks of white; the other is hollowed out and filled with a spongy white substance. The kicker is that the rock in which they where found is Precambrian - and dated to 2.8 billion years old! Who made them and for what purpose is unknown.
There is some pretty crazy stuff, a couple of them sounds like they are hoaxes, but a couple are really weird. Check it out.