Speaking of the Grand Canyon...

"A small robot has scaled a 1,739-foot (530-meter) high cliff of the Grand Canyon in a demonstration of the power of the world's longest-lasting battery."

http://www.allheadlinenews.com/articles/7011070433

And a new free shuttle starts next week to the South Rim. This will hopefully reduce car traffic:

http://www.mercurynews.com/travel/ci_9393075