The thing about our universe is it's big; really big... But all the big stuff and all the small stuff (and all the places that look like they have no Stuff) are all made up of really, really small stuff; particles that themselves may not be made of stuff at all. Sometimes particles can get entangled; caught up with each other. It happens all the time. Once particles are entangled, even if they're separated in space what happens to one of them immediately affects the other no matter how far apart they are. It's spooky, but it's the way it is. This story is about two such particles that became entangled a long, long time ago back when the universe was opaque and was nothing more than a plasma soup.... ...at that time they were the other side of the surface of last scattering. now they're at opposite ends of the expanded and cooler universe, but they are still entangled.

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