Photo: Viva NOLA
Formally known as the Richat Structure, the Eye of the Sahara is a much more appropriate name. This mysterious blue eye has puzzled scientist since the first space flights, when astronauts noticed it looking back at them. Space shuttles use the 50 km-wide feature as a landmark even today, it is so clear in the middle of the barren Sahara desert. Researchers now believe it is a “symmetrical uplift“, essentially an area that rose up as hard quartz while softer rock and sand was eroded from it.