Claimants of paranormal abilities have always attracted controversy and fascination, and sometimes rigorous study by scientists. Charles Bailey, an Australian medium, was seemingly able to materialize different objects--animate and inanimate--under conditions which made it difficult to conceive how they could have been normally produced. Sumitra Singh, a woman of Northern India who in 1984 became subject to epileptic-type seizures, claimed to be possessed by spirits of the dead. Franck Kluski was a Polish poet, banker and physical medium who specialized in both human and animal...