Laura Crossey/University of New Mexico
The eastern Grand Canyon was about half-carved (to the level of the red cliffs above the hiker) from 15 million to 25 million years ago.
Well if you're planning a trip to an amazing natural site like the Grand Canyon, you'd better hurry up. A new report finds that "extreme" climate change has arrived at one of America's favorite places to escape to: our national parks.
The National Parks Service says this extreme warming is already having consequences in parks and historical sites. Joining Take Two to explain more is author of study, Dr. Bill Monahan, National Parks Service scientist.