Bipedal robots have two legs like humans which allows them to be more mobile and versatile than wheeled robots, enabling them to traverse rough terrain. There are two main types of bipedal walking - static and dynamic. Static walking keeps the center of mass within the foot area for balance but uses more energy, while dynamic walking allows the center of mass to move outside the foot area, making it less stable but more energy efficient. The document discusses the expected movements of bipedal robots like walking, running and climbing stairs. It also covers control systems and sensors needed to achieve dynamic walking, seen as the obvious choice.