他抬起双手已示无害,踏前一步想要解释,却看到了丽兹挥手,石齿剑在地上划出了一道笔直的界限。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.
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