I agree with the spirit of your comment, but it's true that legged robots are becoming a reality, and showing their usefulness in real-world locomotion tasks.

I agree with the spirit of your comment, but it's true that legged robots are becoming a reality, and showing their usefulness in real-world locomotion tasks. See: http://www.youtube.com/watch?v=VL0aiQAm4RU http://www.youtube.com/watch?v=VL0aiQAm4RU This hexapod uses more energy to get from A to B, about 2x more IIRC, but it's able to clear some rock fields, sand, and brush that would give wheeled or tracked robots trouble.