Classify this one under the same nonsense as the “Bigfoot on Mars” the wooden plank on Mars, or perhaps even the “Face on Mars.” Just an optical illusions, folks from a very, very zoomed in image from the Mars rovers. The Sun newspaper seemingly started this foolishness on what must have been a slow news day.
Doug Ellison from Unmanned Spaceflight put together this “poster” about the gorilla (Click image for larger version):
And the folks at Image Shack show the real dimensions of the rock:
The original image has been around awhile. It was taken by the Opportunity rover back on sol 87 in 2004. Click here to see the original image. Can you see any gorillas? I’m sure if you look really close and zoom in and distort any of the rocks you can see whatever you fancy.