writes ""Building a robot that has legs and walks around is a very expensive proposition. Mother Nature has created many wonderful things but one thing we do have that nature doesn't is the wheel, a continuous rotating joint, and tracks, so we need to make use of inventions to make things simpler," Angle tells IBTimes UK.
"The reason it has taken so long for the robotics industry to move forward is because people keep trying to make something that is cool but difficult to achieve, rather than trying to find solutions to actual human problems. Technology can be extremely expensive if you don't focus.""Link to Original Source