Signs for sharks and seals are created by a University of Exeter student in Cornwall.

Humans are often thought to be the only animals capable of language. But it’s difficult to prove a negative like this because we’ll never definitively know the subjective interior monologues of other ...

In the 1970s a young gorilla known as Koko drew worldwide attention with her ability to use human sign language. But skeptics maintain that Koko and other animals that “learned” to speak (including ...

A deaf cat with heterochromia went viral after demonstrating its ability to understand sign language and use communication ...