They call it Herb2. It’s a dapper robot, wearing a bowtie even while it sits at home in its lab at the University of Washington. Its head is a camera, which it cranes up and down, taking in the view of a dimly lit corner where two computer monitors sit. All perfectly normal stuff for a robot—until the machine speaks: “Hello from the hackers.” Clear across the country at Brown University, researchers have compromised Herb2.