Everyone loves a ghost story.  Some even make a career out of it.  Chad Lewis, author of The Wisconsin Road Guide to Haunted Locations, is one such person, and he hosts The Unexplained Conference, an event that highlights the work of people who make the paranormal a career.  Lewis, who has a master's degree in applied psychology, travels across the Midwest and the world to investigate reports of paranormal activity.  Still, he says Wisconsin is still one of the prime spots.  "That's one of the highlights of the conference," Lewis says, "They can hear about these things that are right in their backyards.  Things get a little eerier when it's right in your downtown."  Those ghost stories, crop circles, UFO sightings and tales from people who have come back from being medically dead.  Wausau Paranormal Research Society consultant Todd Roll can attest to the area's eeriness firsthand.  The UWMC librarian has gone on countless paranormal investigations, but says this area has some of the most interesting.  Reports of the paranormal have come from the former Rogers Theater in downtown Wausau for years.  While standing near a projection booth during an investigation there, he and two others observed a theater seat swinging of its own volition.  "I can't explain what happened," Roll says.  They will be joined by Terry Fisk, Lewis' co-author on The Wisconsin Road Guide to Haunted Locations, who will give a presentation on the different concepts of the afterlife.  Also featured is a Q&A session with Noah Voss and Kevin Nelson, investigators who've appeared on ABC's "The World's Scariest Places."  Event starts 7 pm.  $9 for adults, $5 for children.