On the eastern slopes of the Masai escarpment bordering the Great Rift Valley are natural rock shelters ... The exact number of rock art sites in the Kondoa area is not yet known but it is estimated ...

Africa’s Great Rift Valley stretches across 3,500 miles of territory from the shores of Eritrea to the red soil of Mozambique, and is recognized by scientists as the birthplace of humankind.

This area is part of the Great Rift Valley, where Africa is slowly pushed and pulled apart by uprising material in earth's mantle. Eventually, the rift will become deep enough to host a new ocean ...