The world today is filled with dangers, hence the sick joke that the reason wehavenotbeencontactedbyanaliencivilizationisthatcivilizationstend to destroy themselves when they reach our stage. Para.

• 当今世界充满危险因此就有了那个令人颤栗的玩笑说我们尚未受到外星文明造访的原因在于但凡文明发展到我们这个阶段他们往往就自我毁灭了。