The second-largest corporate employer has bet big on robot workers to scale. Wheeled mobile robots move tall inventory pods filled with items inside an Amazon fulfillment center. Credit: Amazon No organization in the world operates more robots than Amazon. The company already has more than 1 million robots working in warehouses around the clock to make tens of millions of same-day and one-day package deliveries happen on a daily basis—and Amazon is poised to significantly grow that robotic fleet...