<P> Namibia, in addition to the Apollo 11 Cave complex, has a significant array of San rock art near Twyfelfontein . This work is several thousand years old, and appears to end with the arrival of pastoral tribes in the area . </P> <P> Laas Geel is a complex of caves and rock shelters in northwestern Somalia . Famous for their rock art, the caves are located in a rural area on the outskirts of Hargeisa . They contain some of the earliest known cave paintings in the Horn of Africa, many of which depict pastoral scenes . Laas Geel's rock art is estimated to date back to somewhere between 9,000--8,000 and 3,000 BCE . </P> <P> In 2008, archaeologists also announced the discovery of cave paintings in Somalia's northern Dhambalin region, which the researchers suggest includes one of the earliest known depictions of a hunter on horseback . The rock art is in the Ethiopian - Arabian style, dated to 1000 to 3000 BCE . </P> <P> Other prehistoric art in the Horn region include stone megaliths and engravings, some of which are 3,500 years old . The town of Dillo in Ethiopia has a hilltop covered with stone stelae . It is one of several such sites in southern Ethiopia dating from historic period (10th - 14th centuries). </P>

Importance and significance of art during prehistoric period