A fight against pseudo-science is held by many scientists of the 20th century In this book, Carl Sagan Sagan provides a skeptical analysis of several kinds of superstition, fraud, pseudoscience and religiousабяжг beliefs, such as gods, witches, UFOs and faith healing However, based on "some experimental support," Sagan calls for serious scrutiny of a handful of seemingly inexplicable phenomena such as reincarnation and psychokinesis, not because he regards them as lавсятikely to be true, but because anomalous data deserves close scientific study.