Halstad

 was a planet of ash on the edge of known space, it was destroyed by a burst of cosmic rays seven years ago. There was a humanoid race inhabited it before it was destroyed with pre-space flight technology. The radiation wiped out all life on the planet even bacteria, the seas were vaporised even the first 100 metres of bedrock was blasted to dust. The spaceprobes sent there say its just a sterile desert and Bernice Summerfield said there was not much use digging there as there weren't any ruins as there wasn't any soil and even the fossil record would have been disintegrated and was under quarantine. Irving Braxiatel e ven said the whole star system was under quarantine as well as the authorities thought that the radiation might not be unique. It was later discovered that it was destroyed by the Gulfrargs. The Gulfrargs destroyed it just to make its items more valued. (AUDIO: The Extinction Event)