From bravery to bewilderment, this golden retriever’s encounter with a robotic vacuum is the funniest standoff you’ll see today.

A pair of swivelling, human-like robotic arms, built for physical artificial intelligence research, mirror the motions of an operator in a VR headset twirling his hands like a magician.

The four-legged robots played multiple roles in the test operation. Some carried ammunition to dispersed frontline troops, ...