On top of Atlas, the humanoid robot that can walk like us now, DARPA unveiled Cheetah. A robot that could run faster than Usain Bolt. But that was last year. This here, is WildCat. It is based on the same design as Cheetah, but it doesn't have to be tethered to a power cable like its predecessor.

Cheetah is still faster than WildCat though. And WildCat can keep up that speed for as long as it motor runs, which humans definitely can't. Imagine if it were programmed to kill you. This thing won't give up.

[Boston Dynamics via Engadget]