The provided texts explore the geological history of the Sahara Desert, contrasting its ancient past as a seaway teeming with large aquatic life and a later fertile region with its current arid state. One text proposes a connection between the Richat Structure ("Eye of the Sahara") and the legendary Atlantis, referencing Plato's Timaeus and geological evidence of past flooding. Another discusses the cyclical nature of ice ages and their rapid, abrupt endings, potentially linking such an event to the Sahara's desertification. Finally, declassified CIA documents detail a 1967 airborne geomagnetic survey over the Richat Structure, adding a layer of intrigue to the region's mysterious past.