https://apnews.com/805d53859aef46cdb705a7b1a8e37b3d > EAST PROVIDENCE, R.I. (AP) — A wheeled robot named Marty is rolling into nearly 500 grocery stores to alert employees if it encounters spilled granola, squashed tomatoes or a broken jar of mayonnaise. > But there could be a human watching from behind its cartoonish googly eyes.