Gaze Into The Eye Of The Sahara
Also known as the Richat Structure and Guell al-Richat, the Eye of the Sahara sits on the western edge of the Sahara near Ouadane in Mauritania. Early hypotheses pinned the massive bullseye as an impact crater resulting from an asteroid or the product of a volcanic eruption. However, reigning theories today posit that it's a deeply eroded geologic dome. Astronauts have used the Eye of the Sahara as a landmark since the early days of space exploration.
Key Facts In This Video
People have walked across the Eye of the Sahara for thousands of years, yet it went largely undetected until the Space Age. (0:18)
Most scientists posit that the Eye of the Sahara is a deeply eroded geologic dome that formed more than one hundred million years ago. (0:59)
Different types of rock erode at much different rates. (1:52)