A robot named Marty cleans the floors at a Giant grocery store in Harrisburg, Pa., Tuesday, Jan. 15, 2019. On Monday, the Carlisle-based Giant Food Stores announced new robotic assistants will be arriving at all 172 Giant stores by the middle of this year. The chain's parent company says it plans to eventually deploy the robots to nearly 500 stores. (AP Photo/Matt Rourke)
SEEKONK, Massachusetts: A wheeled robot named Marty is rolling into nearly 500 US 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.
