Science writer Edmund Blair Bolles has begun a new blog on the origin of speech: Babel’s Dawn. If it lives up to the promise of its first post, it may prove to be a valuable resource. The blog
aims to become the main source of news and information about the evolution of speech, from primate vocalizations to meaningful exchanges.
I say speech rather than language because speech is a concrete behavior while language is an abstraction. In order to speak our ancestors had to evolve all the general elements of language (e.g., the ability to utter words in syntactical form) along with the specific powers of making verbal sounds.