text: They took multiple sets of pictures in different years. They performed multiple trips to Cydonia, snapping multiple pictures. They went in 1976, when it was first discovered, 1998, revealing no alien life form, and 2001, revealing it to be a lava dome. Each time, they took multiple pictures, studying and publishing them for the world to see. They had found absolutley nothing in 1998 and 2001 that could point to any life forms existing on Mars, proving the theory of aliens on the face to be false.