Grand Erg Oriental Near Douz, Tunisia; 4:20 p.m. Riding camels at midday through the Grand Erg Oriental in the Sahara Desert is a period of heat-induced somnolence.

Star dunes in the Grand Erg Oriental on October 27, 2012 reflect the season east-west shift in wind direction, and the even more chaotic changes from local conditions and occasional storms.

A little while back, I posted one of the greatest examples of the concave-convex illusion I’ve ever seen, where sand dunes in the Sahara look like little craters when flipped upside-down. At the ...

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This erg, called the Grand Erg Oriental, includes hundreds of bumpy dunes that cover a vast area of about 370 miles by 124 miles (600 by 200 km), the Earth Observatory reported. That's a region ...

This erg, called the Grand Erg Oriental, includes hundreds of bumpy dunes that cover a vast area of about 370 miles by 124 miles (600 by 200 km), the Earth Observatory reported.