books.google.com - It is often said that speech is what distinguishes us from other animals. But are we all talk? What if language was bequeathed to us not by word of mouth, but as a hand-me-down?The notion that language evolved not from animal cries but from manual and facial gestures--that, for most of human history,...http://books.google.com/books/about/From_hand_to_mouth.html?id=yEd_FchjDDMC&q=recent&utm_source=gb-gplus-shareFrom hand to mouth
