Many robots depend on cameras and other visual sensors to find their way around the world. But that's not always realistic -- it can be too dark, too chaotic or even play tricks. Thankfully, MIT is prepared. The latest version of its Cheetah robot, Cheetah 3, can run, climb and even jump using contact detection alone -- effectively, while it's blind. The cat-like automaton relies on a pair of algorithms to both 'feel' its way around (much as you would feel your way to the bathroom in the middle of the night) and figure out the best way to move forward.