Boston Dynamics' LittleDog robot struts its stuff in the video below. Note the dynamic double-support gait - it can support itself on just two of its four legs.
(LittleDog robot navigates rough terrain)
The experimental setup includes overhead cameras that help LittleDog analyze the terrain and plan each step. The LittleDog system is actually learning to traverse these varied and rough surfaces by computing a "cost" for each step, which compares the distance moved versus the potential for a fall.
SF readers have been looking forward to this real-world development for almost sixty years, having read about the robass with "fast-plodding, articulated legs, so necessary since roads had degenerated" from Anthony Boucher's 1951 story The Quest For St. Aquin
Drosophila Robotica, The Mechanical Fly
'... the Scarab [flying robot] buzzed into the great workroom as any intruding insect might...'- Raymond Z. Gallun, 1936.
Robo-Raven Flapping Wing Robot Bird
'When he had first built them, they had been crude indeed, flying mechanisms with little more than a reflex-response unit.'- Philip E. High, 1968.
Bartendro Robot Bartender
'He sipped the cognac that the robot bartender handed him...'- Alfred Bester, 1956.
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Sky City's 220 Stories Are Go
'It rested among green parklands and... stood in total isolation, a glittering block of whites and flashing windows dotted with colors.'
Robo-Raven Flapping Wing Robot Bird
'When he had first built them, they had been crude indeed, flying mechanisms with little more than a reflex-response unit.'