Four-legged bot uses drone sidekick to avoid rough terrain
 

Even with a sure-stepping robot like DARPA's Big Dog, there is still plenty of terrain that today's packbots simply can't handle. That's why a team of researchers from ETH Zurich's Autonomous Systems Lab has devised a way to ensure these robots nev...

http://www.engadget.com/2015/10/05/f...rough-terrain/