The company, which uses the machines for sorting and moving packages inside warehouses, is already one of the world’s top robot makers.

Amazon's Tetromino project aims to automate delivery stations using AI and robotics, significantly enhancing package processing speed.

The robots glide across the floor, sometimes pausing to spin a quarter turn or two before resuming their route. They come close to one another but never collide. It's not choreographed – they're ...