[pandamonium]

Little EVA - Locomotion - walking robots

from Wikipedia

Robot locomotion is the study of how to design robot appendages and control mechanisms to allow robots to move fluidly and efficiently. Although wheeled robots are typically quite energy efficient and simple to control, other forms of locomotion may be more appropriate for a number of reasons (e.g. traversing rough terrain, moving and interacting in human environments). Furthermore, studying biped and insect-like robots may impact biomechanics.