Overheard - New BigDog video

Boston Dynamics has released a new video of BigDog, their military transport quadruped.  This is one robot you want to keep an eye on — very cool.  According to Boston Dynamics PR:

BigDog is a quadruped robot that walks, runs, and climbs on rough terrain and carries heavy loads. BigDog is powered by a gasoline engine that drives a hydraulic actuation system. BigDog’s legs are articulated like an animal’s, and have compliant elements that absorb shock and recycle energy from one step to the next.

Here’s LittleDog -- I think it looks like a bat.