A mysterious metal ball reportedly fell from space , landing in a grasslands area of the African nation of Namibia. So far experts claim the object is not of alien origin. It has two bumps on each end, appears to be hollow and weights about 13 pounds. Namibia's National Forensic Science Institute Director Paul Ludik said the sphere is 3.6 feet around and is made out of a "sophisticated" alloy that is not unknown to modern science, although it has no identifying markings to link it with a country or a company. So far that's about all we're told. But...