Ennedi an Eden in the Sahara; Chad / Photo 2002.Hubert Gillet (1924-2009); ethnobiologist of the desert; naturalist and discoverer of the Ennedi; nicknamed "the ethno-botanist of the sahel"; devoted eight years of exploration of its smallest nooks and crannies in order to draw up an inventory and study of its plant population from 1957 to 1964 / Photo 2002.