Top Nuclear Plasma Physicist John Brandenberg claims he has evidence a Nuclear Winter on Mars occurred approximately 250 million years ago. According to Brandenberg, 2 Atomic weapons the size of the Empire State Building were dropped on Mars from Space. He suggests NASA has known about this since 1976, and after he offered his assessment he was told to go ahead and publish his work. "They want this information to come out. They want people to know about Mars and the ancient civilization which existed there."