This Isn't Photoshopped of the Day: NASA Mars Rovers Accidentally Drew This

This may be the most expensive penis graffiti in the history of humanity. NASA's twin exploration rovers Spirit and Opportunity accidentally drew what appears to be a large phallus during their 10km-plus exploration on the surface of Mars. The discovery was first made yesterday by Redditor radioactive_toy in a post submitted to the /r/pics subreddit, which quickly reached the frontpage and temporarily brought down the NASA web server as a result of the "Reddit Effect."