Even as recently as the early 1950s, we didn’t understand that there were different types of memory, or how the brain processed and stored memories. Then, in 1953, a radical surgery by a reckless doctor gave us tremendous insights into how human memory works. Those scientific gains came at a terrible cost, however. The surgery left the patient, Henry Molaison, a profound amnesiac -- completely incapable of forming new memories. This is his story.
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