The awkward march of the military’s Robo-mule was sturdy, if inelegant. Now, the newest animal-inspired robot sponsored by the Pentagon’s Defense Advanced Research Projects Agency (DARPA) takes its cues from a much faster beast: The cheetah. Robo-cheetah is “freakily fast,” clocking in at 18 miles per hour.  At this rate, says Andy Greenberg at Forbes, such robots may one day “leave flesh-and-blood animals in the dust, too.”