How are delusions born? How to draw the line between science and pseudoscience? Do you believe in the paranormal? Why haven't aliens made contact yet? Is time travel real? Can we live forever? Does God exist? These questions are answered in the book by perhaps the most famous skeptic in the world. It is this word that defines Michael Shermer's ideology, he chose it for the name of an entire line of activity, including Skeptic magazine, a society, a website and a column in Scientific American magazine, in which Shermer has published articles for many years. A tireless popularizer of science, he introduces the reader to discoveries, experiments and the latest research results in various fields of science and teaches him to analyze the facts and be skeptical of dubious theories.