When the manna melted each morning under the desert sun, it did not simply evaporate. According to the Mekhilta DeRabbi Yishmael, the melted manna formed streams that flowed all the way to the Great Sea, the Mediterranean, creating an extraordinary chain of events that extended God's provision far beyond the borders of the Israelite camp.
Harts, roebuck, fallow-deer, and other wild animals living near the coast came to these streams and drank from them. The water carried the essence of the manna, the heavenly bread dissolved into liquid form. When the animals drank, they absorbed the manna's taste into their flesh.
Then the peoples of the nations hunted these animals, as they normally would. They roasted and ate the deer and game they caught. And when they bit into the meat, they tasted something they could not explain. The flesh of these animals carried the taste of the manna that had descended from heaven for Israel.
This teaching transforms the manna from a private miracle into a public one. The nations of the world, who had no covenant with God and no claim on His provision, still received a taste of what He was giving Israel. They experienced it secondhand, filtered through streams and animals and the hunt, but they experienced it nonetheless. The taste of heaven reached them through the natural world, a whisper of the miracle that Israel received directly. The uncollected manna was not wasted. It became a vehicle for the entire world to sample, however faintly, the bread that God rained down each morning from the sky.