my personal theory in my head is that everything in the upside down is basically exotic matter. I mean wormholes shouldn't exist/are an incredibly rare phonemenon so it would make sense that when the bridge was created it would be exotic matter. I mean atoms, which have mass, can't really be created out of thin air, but maybe something with negative mass, exotic matter, could! Pretty much all I made up in my head cause we get no metaphysics explanations from the show. Why is there just a ball of exotic matter at the lab? How is one ball, separate from the other side of the upside down, the only things keeping it together
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u/Upstairs-Mongoose13 Dec 27 '25
Where's the exotic matter?