I'm always a little wary of popular science books that start with a personal story, but I'll make an exception for Madeleine Beekman's excellent book, which sets out a possible explanation of our ability to speak, because the approach fits in with a well-balanced combination of storytelling and scientific information. There have been a good number of books that either set out to explain some of our species' physical oddities or abilities that seem to set us apart from other animals. Twenty years ago I was impressed by Clive Bromhall's The Eternal Child , which suggested retaining infantile features (neoteny) enabled us to exist more effectively in large groups, while many authors have attempted to highlight aspects of being human that set us apart (as was the case with storytelling in Brainjacking ). Here Beekman first takes us through what palaeontology can tell us about the development our biological form, then explores the function of speech and language. In ma...