Which desert is known for its unique 'fairy circles'?

In which continent is the Kalahari Desert located? In which continent is the Gobi Desert primarily located? What is the world's driest non-polar desert? In which country is the Chihuahuan Desert primarily located? In which country is the Arabian Desert primarily located? What is the largest hot desert in the world? Which desert is located in the southwestern United States and northwestern Mexico? What is the largest cold desert in the world?