Chimpanzee Gestures
This article talks about a study of meaningful gestures among chimpanzees. I have to wonder if there is grammar involved, as a sign language has -- chimps are pretty good at learning sign languages. Also, I wonder if any of the gestures held in common among chimpanzees, gorillas, and humans are universal across human cultures. That would be a fascinating bit of "universal language" if so. I know that some gestures are markedly different in human cultures, while others tend to be more consistent.