Long an overnight AM radio fixture on “Coast to Coast AM,” Art Bell, W6OBB, will return to the air with a new show via SiriusXM satellite radio. The topics he’ll explore on “Art Bell’s Dark Matter” will be largely the same, however — the paranormal and unexplained, such as UFOs and alien visitors, weird science and perhaps even his old standby, “remote viewing.” Bell will host guests and take telephone calls from listeners nationwide, says SiriusXM, promising “an uncensored, unscripted forum.” Bell will produce the show from studios in his home in Pahrump, Nevada.