Did God give us the answer to this miracle in the same story to prove He is the “Intelligent Designer”? The manna being a perishable food product spoiled fast in it’s raw state lasting only one day. Then God tells them to pick double the manna on the sixth day because of the sabbath on the seventh day. The reason why the manna lasted two days without spoiling is Because God tells them this time to “bake” or “boil” the manna, Him knowing but the people not knowing that “cooking” the manna would preserve it for two days in it’s “cooked” state instead of one day in it’s “raw” state. As far as I know I am the first person to figure out through modern science any of God’s miracles.