As Amazon expands use of warehouse robots, what will it mean for workers? [Video]

Amazon has introduced a handful of robots in its warehouses that the e-commerce giant says will improve efficiency and reduce employee injuries.

Two robotic arms named Robin and Cardinal can lift packages that weigh up to 50 pounds. A third, called Sparrow, picks up items from bins and puts them in other containers.

Proteus, an autonomous mobile robot that operates on the floor, can move carts around a warehouse. The bipedal, humanoid robot Digit is being tested to help move empty totes with its hands. And there’s also Sequoia, a containerized storage system that can present totes to employees in a way that allows them to avoid stretching or squatting to grab inventory.

Amazon says Robin is currently being used in dozens of warehouses. The others are in a testing stage or haven’t been rolled out widely. But the company says it’s already seeing benefits, such as reducing the time …