National Geographic: National Parks Collection: Grand Canyon

ShareThisJoin a scientific expedition along the 277 miles of the Grand Canyon with this fascinating National Geographic special. Along the way, you'll experience hazardous rapids and explore some of the canyon's enduring mysteries. The scientists search for new evidence about how and when the canyon was formed, why its mountain lions continue to be plagued by a deadly disease, why the majestic California Condor nearly became extinct, and more.