佢話 ︰ 想像一下我哋收到 一個來自外星文明嘅信息 上面寫住 ： 「 地球上嘅人類 ， 我哋五十年之後會到達你哋嘅星球 。
He said: Imagine that we receive a message from an alien civilization that says, "Humans on Earth, we will be on your planet in fifty years.