Researchers at University College London's Institute for Sustainable Heritage conducted an experiment asking how participants felt about a number of different aromas. Among them, of course, was an old book. Their findings were published in Heritage Science (https://heritagesciencejournal.springeropen.com/articles/10.1186/s40494-016-0114-1). Without knowing what they were smelling, participants overwhelmingly described the smell of books as being like chocolate. [...]