Why Luke Skywalker’s arm has to talk to the brain.

Here’s a link to my new blog entry, Why Luke Skywalker’s arm has to talk to the brain.

Here’s how it starts: When I was a kid, I wondered how the mind controlled the body. If the mind was an airy, ethereal spirit, how did it get muscles to contract and bones to move? How, I wondered, did the ghost control the machine? Read more.

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