Serve Robotics, the sidewalk delivery robot company backed by Nvidia and Uber, is expanding into a new category with its latest acquisition: healthcare. Los Angeles-based Serve Robotics announced Tuesday it was acquiring Diligent Robotics , a startup that builds robots named Moxi designed to assist in hospitals by delivering lab samples, supplies and other tasks. The deal values Diligent’s common stock at $29 million. Diligent Robotics was founded in 2017 by Andrea Thomaz and Vivian Chu and has