Ever wondered which robot was one of the first to walk properly? Check out . This by the Mobile Robots Group over at MIT Labs was not only known for its walking ability, but also for how quickly and cheaply it was produced. However, it did need four microprocessors, 22 sensors, and 12 servomotors to function.

The way it walked on its six legs also coined (and some other hexapod robots) the term "the Genghis Gait".

NASA, of course, has had its fair share of incredible robots, but one that really stands out is the .

Its main purpose was to demonstrate the kind of technology required to send an efficient, free-ranging robot to Mars, but in a relatively cost-effective way. The Pathfinder managed to enter Mars's atmosphere with a parachute and airbags for protection, and the Sojourner sent plenty of useful data about the Red Planet back to Earth for later use.