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.永(🤛)生的条件有二个，第(dì )一：种族当中必须有人存活(huó )。第(🏛)二(èr )：只(zhī )能避免(🛵)生老病死，如(rú )遇到(dào )毁灭性(xìng )的(de )意外，仍会死亡。如遇到第二种死亡，你会像之前那样重(🏙)新附身到其他同族身上。