MIT's Cheetah robot has finally been let off the leash -- and boy can it run. Watch as it bounds across a grass field, and even jumps over a hurdle. It isn't quite up to the evolutionary magnificence ...

DARPA and Boston Dynamics have broken their own legged-robot land speed record: Cheetah, which set a record of 18mph earlier in the year, has now been clocked at 28.3mph (12.6m/s) -- faster than Usain ...