It only takes five generations of learners for a pantomime to become a stable sign.
I know that gorillas and chimpanzees can learn sign language and use it to communicate. But can other animals use sign language, too?
We talk to our house pets all the time, but wouldn't it be great if your cat could answer you in English?
We've talked before about how surprisingly flexible the brain is. Learn about the amazing connection between sign language and the brain.