The study says the Colorado River took a convoluted path as it carved the canyon — and got help from an ancient lake.

Arizona is renowned for its breathtaking natural landscapes, and slot canyons are one of the state's most intriguing features. The area around Page, adjacent to Lake Powell in northern Arizona, stands ...

As the sun dipped low to the southwest of the Grand Canyon, tourists flocked to the rim. They lined up to catch the shuttle to Hopi Point, and gathered in the hundreds by the visitor center, clutching ...