When the Sahara was Green

Interview of the Prof. Sébastien Castelltort about his recent research carried out in the Sahara Desert. Over the last four years, the Dr. Abdallah Zaki and the Prof. Sébastien Castelltort collaborated at the Department of Earth Sciences, University of Geneva (Switzerland). They studied ancient riverbeds in the Egyptian Sahara and discovered that 10 000 years ago the climate was much wetter and forced people to migrate away from the Nile valley into what are today desert lands. This video was produced in collaboration with the association Animuse.