A Bayesian analysis performed in 2009 suggests an origin for all known Semitic languages in the Levant around 3750 BC, with a later single introduction from South Arabia into the Horn of Africa around 800 BC. This statistical analysis could not, however, estimate when or where the ancestor of all Semitic languages diverged from Afroasiatic. It thus neither contradicts nor confirms the hypothesis that the divergence of ancestral Semitic from Afroasiatic occurred in Africa.