Something a bit strange happened at the beginning of the class. To see what you reported, click here.
http://www.msss.com/education/facepage/face.html
Now look at a much later image from Mars Global Surveyor and see what the face really is.
http://www.msss.com/mars_images/moc/extended_may2001/face/
Image recorded during orbits 3253 and 1216 by the High Resolution Stereo Camera (HRSC) on board ESA's Mars Express. Image is based on data gathered over the Cydonia region, with a ground resolution of approximately 13.7 metres per pixel. Cydonia lies at approximately 40.75° North and 350.54° East. When the surface details are just below the resolution capability of the camera (Viking), the proper Sun angle produces shadows in the surface feature that make it look spookily like a face. Mars Global Surveyor, with a camera far superior to Viking, shows the truth.
Late in 2006, the ESA Mars Express spacecraft orbiting Mars once again explored the "face." Its camera is even better than the one on Mars Global Surveyor, which went silent in late 2006 and is presumed lost. Mars Express resolved even more detail on the feature. Click the link below for the latest image. Does it still look like a face?
http://www.esa.int/SPECIALS/Mars_Express/SEM09F8LURE_1.html
An opinion piece from Space.com: http://www.space.com/opinionscolumns/opinions/ford_000613.html