quadruped

Boston Dynamics' 2010 demo of BigDog, a quadruped robot that climbs through woods, recovers from kicks, slips on ice and jogs at 5 mph. It was an early showcase of dynamic legged locomotion.

Short footage of the General Electric Cybernetic Anthropomorphous Machine, or Walking Truck, a 1960s quadruped vehicle operated by a human driver using hydraulic limbs. The uploader notes it predates Big Dog by decades.

A short Boston Dynamics clip of the DARPA-funded Cheetah quadruped robot hitting 28.3 mph on a treadmill, slightly faster than Usain Bolt's fastest 20 meter split.

Boston Dynamics' March 2008 video of BigDog, a four-legged robot, walking on ice and snow, climbing rubble and recovering from slips and kicks.

Boston Dynamics shows WildCat, a four-legged robot built with DARPA funding that reached about 19 mph using bounding and galloping gaits.