Comment Re:Legs never made sense (Score 1) 47
Yeah, and tanks and jeeps don't need smooth roads. But they are a lot less efficient. As for "Mars rovers", the problem is we don't have a good engineering of legs yet. Wheels are easier to build. (Just look at the problems of designing a good hand for a robot to get an idea. They've tried all sorts of approaches.)
Actually, a bipedal gait is a difficult problem. Quadrupeds are much easier, but they don't work as way in spaces adapted for people.