Origin of the myth
It was for a while, that, Christian and Jewish scholars believed that these stories (the Bible) were handed down to them by Yahweh. But in the 19th century, we've found the 'grand prize'!, ancient Sumerian texts. Yes virtually all of the myths from Genesis come from these texts.
The Origins of the Garden of Eden Rejection of Pascal's Wager's article on the origins of the Garden of Eden.