末日倒数 地球大撤退  

　　If we faced a countdown to destruction, could we build a spacecraft to take us to new and habitable worlds? Can we Evacuate Earth? NGC's two-hour special examines this terrifying but scientifically plausible scenario by exploring how we could unite to ensure the survival of the human race你的笑容是我每天最期望的阳光，让我感受到了生命的美好和暖和。