The U.S space agency’s Curiosity rover, which has roamed the surface of Mars since 2012, has sent back lots of amazing pictures. But a new photo is generating more talk than any others: It depicts a bright beam of light on a plain in the distance. The beam has got people asking questions about possible life on the planet. “This is not a glare from the sun, nor is it an artifact of the photo process,” Scott Waring, of UFO Sightings Daily, claims. NASA has dismissed speculation about aliens, however, saying it’s probably just a shiny rock.