10 people who became geniuses after brain damage

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What creates a genius? Is it simply a function of having the right brain patterns, or is there a deeper mechanism at work? Just as savants like Daniel Tammet and Alonso Clemons demonstrate superhuman mastery in certain subjects, there have been people throughout history who gained extraordinary abilities from freak accidents. Unfortunately, genius often comes at a price.

[Video and text source: TopTenz YouTube channel]