Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying.

Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying.

存在两种可能性:要么我们在宇宙中是孤独的，要么不是。两者都同样可怕。

-- Arthur C. Clarke 亚瑟·C·克拉克