Sumerian Mythology And The Holy Quran
The evidence is concrete and is based on the study of thousands of tablets that Sumerians carved. Their study is its own branch of anthropology called Assyriology. Epic of Gilgamesh is very famous. Here are some important links: https://www.loc.gov/collections/cuneiform-tablets/about-this-collection/ https://www.greatarchaeology.com/assyriology.htm