One day recently, on a table in Jean Oh’s lab in the Squirrel Hill neighborhood of Pittsburgh, a robot arm was busy at a canvas. Slowly, as if the air were viscous, it dipped a brush into a pool ...

FRIDA, a robotic arm with a paintbrush taped to it, uses artificial intelligence to collaborate with humans on works of art. Ask FRIDA to paint a picture, and it gets to work putting brush to canvas.