Ancient Cannon Found On Mars, In Spirit Rover Photos, July 2016, 2 Photos, UFO Sighting News.

Date of discovery: July 2016
Location of discovery: Mars, Spirit Rover, Sol 828

Today I found an ancient cannon sitting on the surface of Mars. Its two wheels in back are easy to see, and the opening of the end of the gun is also easy to make out. The cannon has a gun sight at the end of the barrel. The gun sight is curved and very long, the perfect hight to account for gravity and distance. It doesn't look like an advanced modern weapon, but still is an ancient weapon. 
Scott C. Waring