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Maybe not. Just dropping. Here's kind of a crude analogy. So the heat out of a frozen dinner properly needs to travel through the food and mix fully. For the universe, for the universe comparison, it's too large for a rather zoo to have happened from the time it actually formed. So Vering Speed of Light series suggests that light travels much faster earlier on, which it allows distant edges to be connected and the cosmos expanded. Light would then have decreased in speed as the density of the universe changed. The theory that challenges this, that I mentioned earlier, is that it's dropping.