>What is space made out of?
The Eli5 answer? We don’t really know. General Relativity would say that it’s a kind of mesh that tells matter how to move. Quantum Mechanics would mostly say that it doesn’t matter; just use the known formulas to work out the probabilities of things happening. Looking at it from an Entropy standpoint might make you think that it’s just a place for information.
But really, we don’t know. Dark energy, dark matter, and our inability to reconcile our great two theories hint that we don’t have a handle on that space really is.
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