1. Die Minen des Hephaistos - Hightech in der Kupferzeit
Aired: Nov 30, -1Terra X - Rätsel alter Weltkulturen
Season 25 Episode 15: Magische Welten: Sahara - Vorstoss ins Ungewisse
Until the middle of the 20th century, the Sahara was mainly unexplored by (Western) science, despite French or British colonial rule. The last blind spot was the Erdi-Ma region in north eastern Tchad, considered impractical and dangerous...