We can communicate with chimps. When put to the test, people can usually understand the meaning of ten common gestures used by chimpanzees. Human infants also use some of the same gestures before they ...

While working at the Salk Institute for Biological Studies in La Jolla, Calif., the late cognitive neuroscientist Ursula Bellugi discovered that, much like spoken language, sign language was made up ...

So, you want to learn sign language on a budget. You could be motivated by a desire to understand deaf friends better, communicate with relatives who are hard of hearing, or express yourself after ...

Jenny was taught to sign as a baby, but she only learned the basic stuff — enough to get by. The Californian, who was born with auditory processing disorder and a right eardrum that doesn’t vibrate in ...