Elon Musk showed off a prototype humanoid robot walking and waving its hand, seeking to demonstrate Tesla Inc.’s advances in artificial intelligence.
Tesla Inc. is plotting a potential lithium refinery on the gulf coast of Texas, a move that would bolster the company’s battery-production efforts and further expand its footprint in the state.
Four months have passed since the chief executive officer of Tesla tweeted he was working on a third “master plan” for the electric-car maker.
