Michael Brown is a professor of anthropology and Latin American studies at Williams College in Williamstown, Mass. He has written about belief in magic and in channeling.

Eugene Gallagher is a professor of religious studies at Connecticut College in New London. He has written about belief in sorcery and new religious movements. He is the co-author of Why Waco.

The American Ghost Society is a national network of ghost hunters, authors, ghost enthusiasts and psychical researchers who conduct investigations into the paranormal. They maintain a list of members and ghost hunters by state.

Robert Todd Carroll is the author of The Skeptics Dictionary: A Collection of Strange Beliefs, Amusing Deceptions, and Dangerous Delusions (John Wiley & Sons, 2003) and maintains a website of the same name. He is a retired philosophy professor at Sacramento City College in California.

Barry Karr is executive director of the Committee for Skeptical Inquiry, which aims to promote scientific inquiry, critical investigation, and the use of reason in examining controversial and extraordinary claims.

James Randi is one of the foremost skeptics of all things paranormal. He is the founder of the James Randi Educational Foundation, a nonprofit organization dedicated to educating the public about fraudulent paranormal claims. It is based in Fort Lauderdale, Fla. He says people believe in the supernatural because it is comforting to think there […]

Jeff Belanger is the founder of Ghostvillage.com, an Internet community dedicated to the supernatural, and the author of several books on ghosts and the dead including The World’s Most Haunted Places, Weird Massachusetts, and Who’s Haunting the White House.

Tim Winter is President of the Parents Television Council in Los Angeles, which tries to bring more family oriented programming to television and monitors network programming.

Alexander Seinfeld is a rabbi and an expert on Judaism and the supernatural and has given talks on the subject of Judaism and ghosts, necromancy and astronomy. He is based in Baltimore.