Tesla thinks it will be able to sell an Optimus robot to every single person on earth, all on its way to selling at least 20 billion of them in total.

MIT professor Daniela Rus explains how AI-powered robots are being trained to safely assist in homes and daily life.

Reinforcement learning—the fancy AI industry term for trial and error—was used to train it, including looking at videos of "human motion references" to improve its movements. The result, as you can see, is a robot that can adjust to different shots on the fly and return the shots very naturally for some long rallies.