Archaeologists have discovered 'extraterrestrial metal' in ancient burials in Poland.They uncovered four artifacts, three bracelets and a pin, containing a metallic iron found only in meteorites.The pieces were pulled from two Early Iron Age cemeteries, dating between 750 to 600 BC, in southern Poland...The results showed high concentrations of smelted ore and meteoric iron that appeared to have come from a single space rock.The high nickel levels in the iron suggested the jewelry was made from an ataxite meteorite that feature a mirror-like finish.The researchers also said that the mixing of the iron sources was likely done on purpose to...