In a remote region of the Sahara Desert, an impact crater was punched into the land less than 100,000 years ago. Measuring some 500 meters (1,640 feet) wide and about 70 meters (230 feet) deep, the Amguid Crater is located in southwestern Algeria. On satellite imagery, the white spot of the flat, sandy crater floor is clearly visible; the residue formed by millennia of sporadic rain running into the bowl and evaporating. The first known record of the Amguid crater in scientific literature was made by the French explorer Roman Karpoff,…
