Five of Boston Dynamics’ yellow, four-legged Spot robots turned the America’s Got Talent stage into a live, robotic engineering demo on the June 10 broadcast, dancing in perfect time to Queen’s “Don’t ...

The robot is shaped like a human, but it sure doesn’t move like one. It starts supine on the floor, pancake-flat. Then, in a display of superhuman joint mobility, its legs curl upward from the knees, ...