text: Another thing worth mentioning is the strong resemblance to the landforms found right here in the United States. These mesas are common in the American West, says chief scientist of NASA's Mars Exploration Program. There is no reason that they can't be common on the Red Planet, either. The article states that in Cydonia, the region where the Face is located is actually known to have mesas scattered frequently around the area. Unless Earth's mesas, too, were crafted by aliens, they both must be natural landforms.