text: One reason that the Face on Mars was not made by aliens is because the Mars Global Surveyor got the best picture of it in 2001 and it just turned out to be a natural landform. In line 11 it says that "As a rule of thumb, you can discern things in a digital image 3 times bigger than the pixel size," he also added. "So, if there were objects in this picture like airplanes on the ground or Egyptian-style pyramids or even small shacks, you could see what they were!"