Língua de sinais desenvolvida por beduínos isralenses pode ser a chave do desenvolvimento da linguagem humana.

"Bedouin Sign Language May Be the Key to Human Language Development" 

"Israeli researchers gain insight into human communication from deaf members of the Al-Said tribe in the Negev, who have developed their own unique sign language."

By Ido Efrati Oct 18, 2013 2:42 PM

http://www.haaretz.com/israel-news/.premium-1.553228