Arizona groundwater is a lifeline that sustains cities, tribal communities, farms, and plants and animals. Learn the basics.

Join us for an exciting update on NASA’s Perseverance rover and its remarkable journey on Mars. In this episode, the rover uncovers eerie spacecraft wreckage, offering a glimpse into the challenges ...

Welcome to Red Rock Canyon State Park. Tucked away in Cantil, California, where the Mojave Desert meets the southernmost tip of the Sierra Nevada range, this geological wonderland looks like someone ...

The result is a gap in the sedimentary record which occurs when the age of rocks changes sharply due to the erosion of previous rock, which is then replaced by younger rock. The phenomenon was ...

Thirteen helicopter rescues have occurred over seven days at Grand Canyon National Park, the National Park Service said in a statement Sunday.

Thousands of hikers take on the Grand Canyon’s Rim-to-Rim trek every summer. This year, however, a major trail closure has some experts raising serious safety concerns.

Beloved Washington doctor, Dr. Dennis Smith, died during a Grand Canyon hike. Known for his fitness and orthopedic work, his death may have been a freak accident, a colleague said.

This one-day itinerary includes the best of Grand Canyon's South Rim, including El Tovar, Mather Point, Bright Angel Trail and Desert View Watchtower.

The National Parks Foundation said the Grand Canyon rim-to-rim hike covers 24 miles and is “strenuous.” “Being unprepared can have catastrophic results,” the foundation said on its website.

Grand Canyon National Park is a great destination for sustainable travel, where Xanterra runs four Green Certified Restaurants that repurpose leftover vegetable oil to fuel a train and food scraps ...

A historic find has been discovered beneath the Grand Canyon that's hidden at the bottom and blazing. The uranium mine has pumped toxic water.