If we faced a countdown to destruction, could we build a spacecraft to take us to new and habitabl[展开全部]
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.[收起部分]
