rock drawing showing giraffe, rock picture, painting on rocks, twyfelfontein, namibia

africa african ancient animal archaeological archaeology archeology art bushman bushmen calligraphy culture damaraland drawing engrave engraving engravings epigraphs geologic geology giraffe granite hieroglyph historic inscriptions kunene layer layers mineral namibia namibian native old paint painted painting picture prehistoric region rock rocks showing stone twyfelfontein wildlife