Research: I Googled "Particles + move when you move one + twin".
I was thinking about ways of having characters communicate across space without resorting to "hyperspace" or "subspace channels"; basically, aural communications other than radio. Then I remembered that I once heard of these particles that were like twins: if one moved, the other would move in the same direction, even if they were far, far apart.
Did I just make those up by myself, or are they real particles? Can anyone tell me?