Alright, so we’ve heard about the Sonic Cannon and the Whirlwind Cannon, you should be prepared for the Sun Gun! They were really reaching when they came up with this one. Theoretically, it would have been an orbital weapon capable of concentrating a beam of sunlight onto a point on Earth. The idea was first conceived in 1929, by German physicist Hermann Oberth. His design was for a space station with a 100 meter-wide concave mirror that would be used to catch the sunlight and concentrate back to Earth as a weapon. During the war, Nazi scientists picked up on Oberth’s concept and began to update its design for implementation. They believed that the heat generated through this mirror would be sufficient to boil oceans and flash burn entire cities into ash. An experimental model of the Sun Gun was captured by the advancing American army in 1945. When questioned by interrogators about the nature of the device and its capabilities, the Germans admitted that it was a failed project, with the technology still too many years out of reach.