As the sun dipped low to the southwest of the Grand Canyon, tourists flocked to the rim. They lined up to catch the shuttle ...

The third day of adventure will include a trip to Pa’s Pocket “to roam in and around a replica of an original ranch house and outhouse, down to Whitmore Point Overlook of the Grand Canyon and ...

Since soon after our planet formed, Earth's 4.6 billion-year-long history was dominated by single-celled life. Something ...