Throughout history, the human brain has been remarkably good at
dismissing itself. Everyone from ancient Egyptians to Aristotle has
downplayed the role of the mysterious stuff between our ears. Famed
anatomist Galen gave the brain credit as commander of movement and
speech, but even he brushed aside the white and gray matter, figuring
the fluid-filled ventricles inside the brain did most of the work.
Nowadays, research and technological advances have allowed us a closer
look at the human brain. In the process, we've learned things that would
have made Galen's jaw drop.
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