«Tassili n’Ajjer (Algeria): Is there a presence of extraterrestrial in the city of Sefar?» en inglés con traducción paralela

Tassili n’Ajjer is a vast plateau in south-east Algeria at the borders of Libya, Niger and Mali, covering an area of 72,000 sq. km.  The exceptional density of paintings and engravings, and the presence of many prehistoric vestiges, are remarkable…
Rabah Arkam