Art on stone

the NYTimes has an article on bushman art.

In Southern Africa, you often will see huge boulders that have either "caves" or protected cracks between them, and if you go in, you see art made by the San people, who predated the present day tribes of South Africa by thousands of years.

Many of them have never been discoverd, but hopefully now people in that multi racial country will learn the heritage of those who were there before the Boer, the English, the Malasian, the Indian, and the various Bantu tribes arrived there (most people don't know that the Zulu and other Bantu tribes only arrived in South Africa less than 1000 years ago).