Oh what a tangled state we weave,
When first we practise to deceive!
(With apologies to Sir Walter Scott)

Quantum Entanglement. Spooky action at a distance. Quantum teleportation. Instantaneous transfer of information. Oh, man, does the science media love to talk about this. As does everyone who read a few articles and starts thinking of the wild possibilities. But quantum mechanics is a very, very tricky subject, which may be why I've held off on talking about it until now. No doubt someone will find something wrong with what I say, because I don't have any sort of advanced degree in the subject, and hoo boy is it complicated. Today, though. we're just going to talk about entanglement, one of the fun aspects of quantum mechanics that doesn't really mean what most people think, in its simplest form (because it gets complex fast)...