AS WITH spoken languages, there is no “universal” sign language. Different countries have their own versions, which are related to local cultural and religious backgrounds. For example, American Sign ...

The introduction of writing systems changed the world. It allowed humans to physically express thoughts and language, as well as record events for future generations to study. Although different ...

“The majority of the world population speaks more than one language. Babies are born ready ... so they know why they speak different languages to their friends. Make clear how it can help ...