Just thinking aloud. This again raises something which once intrigued me a lot. How much light do the religious writings of the Old Testament reflect on the prehistory of the Middle East. I think it is accepted they mostly what we now call Bronze Age but maybe they draw on more ancient knowledge.
What exactly was manna - which clearly was life sustaining. Many references to manna in the Old Testament (apparently).
Numbers 11:7-9
The manna was like coriander seed and looked like resin. The people went around gathering it, and then ground it in a hand mill or crushed it in a mortar. They cooked it in a pot or made it into loaves. And it tasted like something made with olive oil. When the dew settled on the camp at night, the manna also came down."