Why are these 32 symbols found in caves all over Europe | Genevieve von Petzinger

Uploader: TED

Original upload date: Fri, 18 Dec 2015 00:00:00 GMT

Archive date: Sun, 05 Dec 2021 22:05:29 GMT

Written language, the hallmark of human civilization, didn't just suddenly appear one day. Thousands of years before the first fully developed writing systems, our ancestors scrawled geometric signs a
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