An ‘alien coffin’ might possibly be added to the long list of curious objects found on the surface of the Red Planet. Puzzled UFO enthusiasts now want NASA’s Curiosity rover to take a closer look. Will Farrar, a UFO (unidentified flying object) hunter from Maryland, US, noticed a strange, box-shaped object as he was looking through a set of photos, taken by the Mars Curiosity rover. On his YouTube...