Mysterious Giant Circle in the Sahara Desert [PIC]

photojournal.jpl.nasa.gov — The Richat Structure, a prominent circular feature in the Sahara desert of Mauritania near Ouadane, has attracted attention since the earliest space missions because it forms a conspicuous bull's-eye in the otherwise rather featureless expanse of the desert. It has a diameter of almost 30 miles and has become a landmark for space shuttle crews. Oct 26, 2008 View in Crawl 4