Everything we know, think and feel—everything!—comes from our brains. But consciousness, our private sense of inner awareness, remains a mystery. Brain activities—spiking of neuronal impulses, sloshing of neurochemicals—are not at all the same thing as sights, sounds, smells, emotions. How on earth can our inner experiences be explained in physical terms?

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Arnold B. Scheibel is a Professor of Neurobiology and Psychiatry and former Director of the Brain Research Institute (BRI) at UCLA.

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