Can vaccinations lead to autism, and taking paracetamol – to asthma? Should you rely on organic products? Do puzzles improve brain development? Can hyaluronic acid be considered a panacea for the skin? When answering these and other similar questions, we are guided by information gleaned from magazines, television and the Internet. But it often turns out that “immutable truths” are pseudoscientific myths and speculations imposed by the media or relics of the past. The author, famous British science popularizer Brian Clegg, shows how to deal with them. It teaches you to think “scientifically” - critically, relying only on logic and common sense. The book will be useful to everyone who wants to know the scientific basis, and not blindly trust unverified sources. It is published in Russian for the first time.