40,000-Year-Old Symbols Found in Caves Worldwide May Be the Earliest Written Language
http://www.openculture.com/?p=1061836 https://t.co/NSbxvQfC6G
40,000-Year-Old Symbols Found in Caves Worldwide May Be the Earliest Written Language
http://www.openculture.com/?p=1061836 https://t.co/NSbxvQfC6G
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