大约就是在距今7万到3万年前，出现了新的思维和沟通方式，这也正是所谓的认知革命。会发生认知革命的原因为何？我们无从知晓。得到普遍认可的理论认为，某次偶然的基因突变，改变了智人的大脑内部连接方式，让他们以前所未有的方式来思考，用完全新式的语言来沟通。
A new mode of thinking and communication emerged about 70,000 to 30,000 years ago, which is the so-called cognitive revolution. The reasons for the event have not yet been known. According to a generally accepted theory, an accidental genetic mutation likely happened and changed the internal connections of Homo sapiens' brains, allowing them to think in an unprecedented way and communicate with a completely new language.
