Cuneiform writing was around for thousands of years until it was replaced by the Phoenician alphabet near the end of the neo-Assyrian Empire. Thanks to the Sumerians, we know a great deal about the ancient Mesopotamian civilizations of Babylon and Assyria as well.
That was the break scientists needed.
Sumerian Writing by Unknown Symbols were made with wedge shaped marks on clay tablets Clay Tablets Writing was inscribed on clay tablets. They listed their household goods. They listed their sales and purchases.
This literature includes mythology of the Mesopotamian gods, tales of their heroes, poetry, and songs. He spotted a picture, carved into the rock of a high cliff.
The symbols often changed over time as well.