A doorway on Mars? How we see things in space that aren t there

Get the Full StoryEnthusiasts lit up social media recently with images of what appeared to be a doorway into a hillside on Mars. Was it, some wondered, evidence that the red planet could be, or have been, inhabited by aliens? The door was imaged by Nasa s Curiosity rover on May 7 on the slopes of Mount Sharp, the central massif within Gale crater, where it landed in 2012. Described on one website as a pharaonic tomb door , because of its resemblance to some ancient Egyptian remains, it is in fact only about one foot high. It is hard to spot on the panoramic This story continues at The Next Web