Mysterious engraved pictographs may have led to the earliest form of writing

A link exists between 6,000-year-old engravings on cylindrical seals used on clay tablets and cuneiform, the world’s oldest writing system, according to new research.

​ A link exists between 6,000-year-old engravings on cylindrical seals used on clay tablets and cuneiform, the world’s oldest writing system, according to new research. Read More Breaking News, Latest News and Videos | CNN