By selling out national parks and other public lands, the Trump administration is endangering some of America’s great travel ...

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.

Of course, reducing health care pollution must never be achieved at the expense of equitable access to high-quality care, but these results suggest that costs and greenhouse gas emissions can be ...

A 92-year-old man is now the oldest person on record to have conquered the Grand Canyon's 24-mile, rim-to-rim hike. Guinness World Records confirmed the feat on Tuesday, about two months after ...

Memorial day weekend promises stunning space views. Here’s how to catch a breathtaking view of the Milky Way in Arizona this month ...

Republicans said their policy bill promised "economic freedom," but energy advocates said it would halt Arizona's clean ...

Dam maintenance and non-native fish reduction efforts led the government to reject an environmentally restorative flood in ...