Book of young scientific journalist Аси Казанцевой - about "basic biological traps that mix to live us happily and to behave well. Leaning mostly against authoritative scientific works and only sometimes - on the personal experience, author enthrallingly and tells accessible, where pernicious habits undertake from, why in November it is so difficult to work and what substances are the basis of "chemistry of love. Graduating student of биофака СПбГУ Ася Казанцева is a jealous popularizer of large science. She was one of creators of the program "Progress on the Fifth channel and by the participant of project "Science 2.0 on the TV channel Russia| her articles and columns were published in the most different editions - from the "Troitsk variant to Men's Health. "Who would think! it is her first book.