ABSTRACT
Learning to be fluent in a foreign language is one of the most difficult intellectual accomplishments an adult can achieve. But for a child, language learning is almost effortless. In fact, it happens with no formal training and can happen with very little input. It occurs at a predictable age and in a predictable sequence. The result of about two million years of hominin evolution, language learning is human beings’ unique adaptation to living in a group and is closely tied to the evolution of the large human brain.
