translation.en: Some serious biologists, and I count myself among them, have begun to wonder that among the enormous and still unknown diversity of microorganisms, one might -- just might -- find aliens among them.
translation.zh: 一些严肃的科学家，包括我 就开始怀疑，在多元与未知的微生物世界中 也许还能找到外星生物的存在