TARS3D is a fully 3D-printed research robot developed by robotics engineer Aditya Sripada, inspired by the fictional TARS robot from Interstellar. Standing 25 cm tall and weighing 0.99 kg, TARS3D integrates seven active degrees of freedom — three rotary joints linking four leg segments and four prismatic actuators adjusting leg lengths — allowing it to switch between multiple locomotion modes using the same mechanical structure. While passive dynamic principles have long informed legged locomoti