In Sumerian, "Eden" is a name for the Steppe. "Heavenly Eden" is also mentioned. It refers to a place that appears to be fertile at first, but later changes to become infertile. Climatologists have said this is a good description of the climate change that happened in The Levant after the last ice age. The green steppe became dry. This meant that food was no longer available all year round, but only at certain times. This forced the people living at the time to start agriculture and to keep some of their food for the periods where there was none. Scientists have referred to this change as the Neolithic Revolution. This change of food is also mentioned in the story.