Some tribes in Africa speak to each other with a vocabulary that includes sharp clicking sounds. Genetic comparison of two such tribes suggests that the unusual click languages, known as Khoisan ...

In Tanzania, the Hadzabe people communicate in part through an unusual vocabulary of clicking sounds. So do the Ju'hoansi of southwestern Africa, located about 1,600 miles away. "It's been a mystery ...

On Windows 8 computers in the United States, English is the default keyboard input method. If you speak another language, or you're trying to communicate with someone in another country, you can add a ...