Cassie is a two-legged robot that walks like an ostrich. It was developed by Agility Robotics.
The legs are only the beginning. Eventually, Cassie will get arms and sensors to help it better interact with the world, and to help it get up if it topples over. Cassie's descendants—equipped perhaps with torsos and other body parts that make them a bit less terrifying—could be employed on delivery runs, search-and-rescue missions, or even as prosthetic limbs. Shelton says Agility wants Cassie to "be the standard for legged autonomy."