Spooky Discovery on Mars Looks Just Like an Alien Doorway

"At the very least, the picture and the geological feature it's captured would seem to be enough to inspire a science-fiction movie or two."

" while the the door-like rock formation may appear to be full-sized in our imaginations, it's possible the cavity seen is only a few centimeters or inches tall in real life, though it's difficult to be certain from the picture."