translation.en: Thomas Edison once said, "We don't know one percent of one millionth And I've come to the conclusion -- because you've asked this other question, "What's another thing you can't see?"
translation.zh: 爱迪生曾说， 我们所知道的不过其百万分之一 于是我下了结论 因为你们已经问了另外一个问题，“还有什么东西我们看不见”