The fastest land robot in the world MAR 06 2012
Flesh and blood cheetahs are the fastest land animals, capable of traveling at more than 70 mph for shorts periods of time. This robotic cheetah can only do 18 mph but could probably go forever and ever until everything on the Earth has been caught and consumed by its steely jaws.
For reference, Usain Bolt's average speed over 100 meters is ~23 mph, so at least he's safe...for a little while. (via ★interesting)
Update: Another team working at MIT has built a robotic cheetah that can leap over obstacles on the run.
No word on how the team working on the robotic cheetah that can rip bloody human flesh from the bone is coming along.