Rise of the mind-reading machines

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So you made your way to this article, but how did you do it? Did your motor cortex fire up the muscle fibers in your fingers to click on a particular area of the screen, prompting the CPU inside your device to load up this page? One day that could all seem decidedly archaic. That's because some smart people are investing big time and money into computers that can read your thoughts as they are conceived. The goal is to have machines that know what you want and will give you the information you need before you could literally lift a finger. But how far off might such a future be? Let's take a look at the current state of these brain-computer interfaces, and the challenges that remain in getting them inside our heads.