She almost makes it look easy. But when Simone Biles executes the wildly difficult skills her competitors won’t even attempt, there are complex physics at work. We show you step-by-step how it’s all possible. https://on.wsj.com/3zxzzXA

She almost makes it look easy. But when Simone Biles executes the wildly difficult skills her competitors won’t even attempt, there are complex physics at work. We show you step-by-step how it’s all possible. on.wsj.com/3zxzzXA