Teddy Warner, 19, has always been interested in robotics. His family was in the industry, and he says he “grew up” working in a machinist shop while in high school. Now Warner is building a robotics ...

It has appeared in Tesla showrooms, on its factory floors and has even posed with Kim Kardashian. But Elon Musk's vision for his human-like robot Optimus is much grander than that. Since first ...