In a tucked-away San Francisco warehouse, four humanoid robots hang out — quite literally, from standalone frames — as they wait for their flesh-and-blood overlords to train them to kill. As ...

Two pint-sized robots were seen boxing at an AI conference in Shanghai, and we've gotta say, they're pretty cool.

In a San Francisco, four humanoid robots make up a machine-based fight club known as REK, which uses trains its bots as prize fighters.