Can vaccinations lead to autism and can paracetamol cause asthma? Should I lean on organic products? Do puzzles foster brain development? Can hyaluronic acid be considered a panacea for the skin? Answering these and other similar questions, we are guided by information gathered from magazines, television and the Internet. But it often turns out that “immutable truths” are pseudoscientific myths and conjectures imposed by the media or remnants of the past. The author, the famous popularizer of science from the UK, Brian Clegg, shows how to deal with them. He teaches to think “scientifically” - critically, relying only on logic and common sense. The book will be useful to everyone who wants to know the scientific rationale, and not trust blindly untested sources.