The key to Simone Biles' dominance could be her brain

Simone Biles is an extraordinary athlete. But what's behind her mastery? Is it her build, the years of training she's put in, or... her brain?

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Business Insider is the fastest growing business news site in the US. Our mission: to tell you all you need to know about the big world around you. The BI Video team focuses on technology, strategy and science with an emphasis on unique storytelling and data that appeals to the next generation of leaders – the digital generation.