text: To start off, Earth has techtonic plates we have known about them for many years and we know that the plates are always moving. With the plates always moving that's what formed the Himalaya Mountains and is what casuses them to continue getting taller. I think the "Face" on Mars is just and example of techtonic plates that are costantly moving and making the "Face" more definant every few years. Just the same way as the Himalayan Mountains not every year do we see a direct change in height with just our eyes. We have to measure it out to find out how much those plate techtonics have moved. That is what I believe is happening with the face, I think that since we aren't able to view it every year and measure how much more defiant it is that the year before or if it has even changed.