Investors are divided over what robot bodies should look like. Business Wire/AP Humanoid companies have raised billions, but some investors are avoiding robots that look human. Skeptics say wheels and specialized robots are safer and more efficient than legs. Humanoid backers say robots need human-like bodies to work in spaces built for humans. Humanoid robots have become the mascot of Silicon Valley's physical AI boom. They dance in viral videos, bang out tunes on the piano, and are headed to