What is spooky about the entanglement?

Question

If it doesn't allow for transmitting of any information, what was/is "spooky" about it? Is there anything spooky about it at all in the end?

Answer 1

No, there is nothing spooky about entanglement.

Answer 2

The thing people consider interesting/spooky is that even though one cannot transmit information by means of an entangled system, an entangled system does have have information stored in a non-local fashion. This is considered weird because all other physical phenomena can be explained using laws which only act locally and entanglement cannot.

Note that alternative quantum mechanical theories like the many worlds theory of quantum mechanics, there is no need for non-locality to explain entanglement.

Answer 3

I think that Einstein called it "spooky" because he didn't get it at that moment. People are scared of strange or obscure things! Especially that he thought that this spooky action violates the relativistic upper limit on speed of propagation of information which seemed (to him) faster than the speed of light. But after understanding the quantum entanglement, there is nothing spooky about it.